Logistic regression works well for perfectly separable data, that is, a hyperplane in the feature space can separate the two classes in the training set.
a. true
b. false

Answers

Answer 1

The given statement, "Logistic regression works well for perfectly separable data, that is, a hyperplane in the feature space can separate the two classes in the training set" is FALSE.

This statement is incorrect because the logistic regression model does not work well with perfectly separable data as logistic regression is not designed to handle perfectly separable data.

Explanation:Logistic regression is a statistical method used for modeling the relationship between a dependent variable and one or more independent variables.

It is widely used for classification problems that involve predicting a categorical outcome.For instance, logistic regression is used to predict the probability of a particular outcome (such as a person's gender, a customer's behavior, or a patient's diagnosis) based on one or more independent variables (such as age, income, education, etc.).However, logistic regression assumes that the data are not perfectly separable.

That is, it assumes that there is some overlap between the two classes in the feature space, and the logistic regression model tries to find a hyperplane that separates the two classes with maximum margin.

This means that logistic regression works best when the data is not perfectly separable. If the data is perfectly separable, then the logistic regression model will not work well because it will fail to find a decision boundary that separates the two classes.

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Answer 2

The statement "Logistic regression works well for perfectly separable data, that is, a hyperplane in the feature space can separate the two classes in the training set" is false.

Logistic Regression is a statistical technique for examining a dataset in which there are one or more independent variables that determine an outcome.

The outcome is determined by a binary variable, which means that there are just two possible results.

In other words, it determines the likelihood of a dependent variable occurring for a given set of independent variables. It is widely used for prediction and classification purposes.

Logistic regression makes no assumptions about the distribution of the independent variables and, unlike linear regression, can use binary, categorical, and continuous independent variables. It also estimates the probabilities of an event occurring.

Linear regression is for continuous data and logistic regression is for categorical data.

So, the statement "Logistic regression works well for perfectly separable data, that is, a hyperplane in the feature space can separate the two classes in the training set" is false because logistic regression works best when data is inseparable.

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Related Questions

HELP PLEASE‼️
There are 148 legs in a farm yard full of goats and chickens. There are 62 total animals. How many of each are there.

Answers

It is 12 goats and 50 chickens to make those animals and that exact number of legs

There were 32 volunteers to donate blood. Unfortunately, n of the volunteers did not meet the health
requirements, so they couldn't donate. The rest of the volunteers donated 470 milliliters each.
How many milliliters of blood did the volunteers donate?
Write your answer as an expression.

Answers

32-n*470=? There’s 32 people and you subtract the n amount that couldn’t donate then multiply by 470

Please help I need help and please explain

Answers

Answer:

click c

Step-by-step explanation:

and its right

Honestly help I’m slow

Answers

Answer:

46 degrees

Step-by-step explanation:

x equals 23 so just multiply by 2

Answer:

[tex]46^{o}[/tex]

Step-by-step explanation:

Bottom-right angle is 65 as 180 - 90 - 25 = 65

Top-left angle is also 65 as angles opposite a point are equal (when divided by straight lines)

Angles around a point = 360 so 360 - 65 - 65 - 90 - 25 = 115

5x = 115

x = 23

23 x 2 = 46

How many significant figures will there be in the answer to the following problem? You do not have to solve the problem. 3.4 • 17.05 =

Answers

Answer:

 3.4  ×  17.015  =  58

Step-by-step explanation:

3.4 →  two non-zero digits  =  two sig figs

17.05 →  four non-zero digits  =  four sig figs

- hope this helps!

12. from the slope of your best-fit line, what is the velocity of the pacific plate, as expressed in cm/yr? (2 significant figures required)

Answers

The velocity of the Pacific plate, expressed in centimeters per year (cm/yr), can be determined from the slope of the best-fit line in a geologic study.

In a geologic study, if data points representing the position of the Pacific plate are collected over a period of time, a best-fit line can be calculated to represent the trend of plate movement.

- The slope of this line represents the rate of change of position over time, which corresponds to the velocity of the plate. By examining the slope of the best-fit line and converting it to centimeters per year, we can determine the velocity at which the Pacific plate is moving.

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A certain county is 25​% African American. Suppose a researcher is looking at jury​ pools, each with 200 ​members, in this county. The null hypothesis is that the probability of an African American being selected into the jury pool is 25​%. a. How many African Americans would the researcher expect on a jury pool of 200 people if the null hypothesis is​ true? b. Suppose pool A contains 17 African American people out of 200​, and pool B contains 39 African American people out of 200. Which will have a smaller​ p-value and​ why?

Answers

Answer: a. 50 African Americans

b. Pool B will have a smaller​ p-value because that pool's number of AA people is further from the hypothesized number of AA people.

Step-by-step explanation:

what is the sum of 3x4

Answers

Answer:

12

Step-by-step explanation:

3 4's

3+3+3+3=12

Hope that helps :)

The sum of this question is 12

Carissa’s gerbil has a tail that is the same length as its body length. Its tail is 102 millimeters. How long is her gerbil in centimeters?

Answers

Answer:

...

Step-by-step explanation:

the answer is 10.2 :)

For the differential equation s" + bs' +9s = 0, find the values of b that make the general solution overdamped, underdamped, or critically damped. (For each, give an interval or intervals for b for which the equation is as indicated. Thus if the the equation is overdamped for all b in the range -1

Answers

The general solution to the differential equation s" + b s' + 9s = 0 can be written as:

[tex]s(t) = c1*e^(-bt/2)*cos(({4b-36)/2)t} 4b-36)/2)t) + c2e^(-bt/2)*sin\sqrt{(4b-36)/2)*t)} (4b-36)/2)*t)[/tex]

where c1 and c2 are constants determined by the initial conditions.

The behavior of the solutions to this equation depends on the value of the parameter b. Specifically, there are three cases to consider:

Overdamped: If b > 6, then the roots of the characteristic equation[tex]s^2 + bs + 9 = 0[/tex] are real and distinct, i.e., [tex]b^2 - 4ac[/tex] > 0. In this case, the general solution is a linear combination of two decaying exponentials, and the system is said to be overdamped. To find the interval for b for which the equation is overdamped, we solve the inequality b > 6, which gives the interval (6, infinity).

Critically damped: If b = 6, then the roots of the characteristic equation are real and equal, i.e., [tex]b^2 - 4ac[/tex]= 0. In this case, the general solution is a linear combination of two decaying exponentials, where one of the exponentials has an additional factor of t. The system is said to be critically damped. To find the interval for b for which the equation is critically damped, we solve the equation b = 6, which gives the singleton set {6}.

Underdamped: If b < 6, then the roots of the characteristic equation are complex conjugates, i.e., [tex]b^2 - 4ac[/tex]  < 0. In this case, the general solution is a linear combination of two decaying exponentials, where the exponentials have a sinusoidal factor. The system is said to be underdamped. To find the interval for b for which the equation is underdamped, we solve the inequality b < 6, which gives the interval (-infinity, 6).

Therefore, the interval for b that makes the general solution overdamped is (6, infinity), the singleton set {6} makes the general solution critically damped, and the interval for b that makes the general solution underdamped is (-infinity, 6).

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Let λ be an eigenvalue of an invertible matrix a. show that λ^−1 is an eigenvalue of A^−1. [hint: suppose a nonzero x satisfies Ax=λx.]

Answers

Let λ be an eigen value of an invertible matrix. Then, [tex]\lambda^{-1}[/tex] is surely an eigenvalue of [tex]A^{-1}[/tex].

What is an invertible matrix?

For a matrix to be invertible, it must have a unique matrix that, when multiplied with the original matrix, gives the identity matrix.

[tex]A * B = B * A = I[/tex]

Suppose A is an invertible matrix and λ is an eigenvalue of A with a corresponding nonzero eigenvector x, i.e., Ax = λx.

To show that [tex]\lambda^{-1}[/tex] is an eigenvalue of [tex]A^{-1}[/tex], we need to find a nonzero vector y such that [tex]A^{-1}y[/tex] = [tex]\lambda^{-1}y[/tex].

Let's start by multiplying both sides of the equation Ax = λx by [tex]A^{-1}[/tex]:

[tex]A^{-1}(Ax) = A^{-1}(\lambda x)[/tex]

(x is nonzero, so we can divide by x)

[tex]A^{-1}(Ax/x) = A^{-1}(\lambda x/x)\\A^{-1}(A(x/x)) = A^{-1}(\lambda)[/tex]    

Since [tex]A^{(-1)}A = I[/tex] (identity matrix), and x/x = 1, we have:

[tex]A^{(-1}(I) = A^{(-1)}[/tex] λ

[tex]A^{(-1)}[/tex] = λ[tex]A^{(-1)}[/tex]

Now, let y = A^(-1)x. We can rewrite the equation above as:

[tex]A^{(-1)}x[/tex] = λ[tex]A^{(-1)}y[/tex]

([tex]A^{(-1)}x[/tex]/λ) = [tex]A^{(-1)}y[/tex]/λ

(x is nonzero, so we can divide by x)

([tex]A^{(-1)}x/x[/tex])/λ = [tex](A^{(-1)}y/y[/tex])/λ

([tex]A^{(-1)}(x/x)[/tex])/λ = ([tex]A^{(-1)}y/y[/tex])/λ

([tex]A^{(-1)}(1)[/tex])/λ = ([tex]A^{(-1)}y/y[/tex])/λ

([tex]A^{(-1)}[/tex])/λ = ([tex]A^{(-1)}y[/tex])/λ

Since [tex]A^{(-1)}[/tex] is a matrix and λ is a scalar, we can rearrange the equation as follows:

([tex]A^{(-1)}[/tex])/λ = [tex]A^{(-1)}[/tex]y/λ

(1/λ)[tex]A^{(-1)}[/tex] =[tex]A^{(-1)}[/tex]y/λ

This shows that 1/λ is an eigenvalue of [tex]A^{(-1)}[/tex] with the corresponding eigenvector y. Therefore, we have shown that if λ is an eigenvalue of A, then [tex]\lambda^{(-1)}[/tex] is an eigenvalue of [tex]A^{(-1)}[/tex]

 

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Is the President doing a good job? We will examine this by taking a random sample of n = 4220 adults and asking whether they feel the president is doing a good job? Of these sampled adults, x = 2222 said the President was doing a good job. (Assume nobody lies.) Let p be the (unknown) true proportion of adults who feel the President is doing a good job. We want to estimate p. X is the random variable representing the number of sampled adults who say the president is doing a good job. have?

a) What type of probability distribution does X have?
O binomial
O gamma exponential
O Weibull
O Poisson

b) What was the sample proportion, P^, of sampled adults who say the President is doing a good job? _____

b) What is the R formula for the expected value of X in terms of n and p?
O sqrt(n*p*(1-p))
O n*p*(1 - p)
On^2
O n*p
O 1/p

d) What is the z critical value that we would use to construct a classical 90% confidence interval for p? _______

e) Construct a 90% classical confidence interval for p? (_____,_____)

f) How long is the 90% classical confidence interval for p? ______

g) If we are creating a 90% classical confidence interval for p based upon the sample size of 4220, then what is the longest possible length of this interval? _____

Answers

(a) Binomial probability distribution does X have. The option 1 is correct answer.  

(b) 0.5265 is the sample proportion [tex]\hat{P}[/tex] of sampled adults who say the President is doing a good job.

(c) n * p is the R formula for the expected value of X in terms of n and p. The option 4 is correct answer.

(d) 1.645 is the z critical value that we would use to construct a classical 90% confidence interval for p.

(e) A 90% classical confidence interval for p is 0.5104, 0.5428.

(f) 0.0324 is the 90% classical confidence interval for p.

(g) 0.0357 is the longest possible length of this interval.

a)  The random variable X, representing the number of sampled adults who say the President is doing a good job, follows a binomial probability distribution. Therefore, the correct answer is option 1.

b) The sample proportion, [tex]\hat{P}[/tex], of sampled adults who say the President is doing a good job can be calculated by dividing the number of adults who said the President was doing a good job (x = 2222) by the total sample size (n = 4220):

[tex]\hat{P}[/tex] = x / n

   = 2222 / 4220

   = 0.5265

c) The expected value of X is given by

n*p,

where n is the sample size and

p is the true proportion of adults who feel the President is doing a good job.

Therefore, the correct answer is option 4.

d) To construct a classical 90% confidence interval for p, we need to find the z critical value. This value can be found using a z-table or calculator and is approximately 1.645.

e) Using the sample proportion, [tex]\hat{P}[/tex], the z critical value, and the sample size, a 90% classical confidence interval for p can be calculated. This is done using the formula:

[tex]\hat{P} \pm z \times \sqrt{\frac{\hat{P} \times (1 - \hat{P})}{n}}[/tex]

The interval is (0.5104, 0.5428).

f) The length of the 90% classical confidence interval for p can be found by subtracting the lower limit from the upper limit: 0.5428 - 0.5104 = 0.0324.

g) The longest possible length of the 90% classical confidence interval for p can be found by using the formula:

[tex]2z \sqrt{\frac{\hat{P} ( 1 - \hat{P})}{n}[/tex]

Plugging in the values from the sample, we get

21.645 √(0.5266(1-0.5266)/4220)

= 0.0357.

This means that the interval can be at most 0.0357 in length.

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A random sample of nı = 19 securities in Economy A produced mean returns of X 1 = 6.6% with sı = 2.3% while another random sample of n2 = 22 securities in Economy B produced mean returns of # 2 = 5% with s2 = 7.7%. Construct a 98% confidence interval estimate for pl H2 Assume that the samples are independent and randomly selected from normal populations with unequal population variances (012 + 022). T-Distribution Table % % < (H 1 - 2) < Round to two decimal places if necessary

Answers

The 98% confidence interval for the distribution of differences is given as follows:

(-2.58%, 5.78%).

How to obtain the confidence interval?

The difference of the sample means is given as follows:

6.6 - 5 = 1.6%.

The standard error for each sample is given as follows:

[tex]s_1 = \frac{2.3}{\sqrt{19}} = 0.53[/tex] [tex]s_2 = \frac{7.7}{\sqrt{22}} = 1.64[/tex]

The standard error for the distribution of differences is then given as follows:

[tex]s = \sqrt{0.53^2 + 1.64^2}[/tex]

s = 1.72.

The critical value, using a t-distribution calculator, for a two-tailed 98% confidence interval, with 19 + 22 - 2 = 39 df, is t = 2.4286.

The lower bound of the interval is given as follows:

1.6 - 2.4286 x 1.72 = -2.58%.

The upper bound of the interval is given as follows:

1.6 + 2.4286 x 1.72 = 5.78%.

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Help with my mathhh!

Answers

Answer:

Step-by-step explanation:

d

Answer:

<BOF

Step-by-step explanation:

sum of both these angles is 180 so C is the answer.

Do the ordered pairs below represent a relation, a function, both a relation and a function, or neither a relation nor a function?
(-5,9) , (0,-1) , (7,-15) , (9,-19)

Answers

Option D is correct.

The relation {(-8, -6) (-5, 2) (-8, 1) (7, 3)} is not a function.

Step-by-step explanation:

Given the relation:  {(-8, -6) (-5, 2) (-8, 1) (7, 3)}

Domain is the set of all possible inputs of a relation i.e { -8, -5 , -8 , 7}

Range is the set of output values of a function i.e, {-6, 2 , 1 , 3}

The mapping as shown below in the figure:

A function is a relation in which every element of the domain is matched to not more than one element of the range.

In other words, we can say that ,no value of x gets mapped to more than 1 value of y.

Since, from the mapping you can see that the domain value -8  paired with -6 and 1;  as x is used more than once.

Therefore, this relation is not a function

PLS HELP PLS HELP PLS HELP PLS HELP PLS HELP I BEG U PLS BOTH QUESTIONS PLS

Answers

Answer:14 is obtuse

15 is A

Step-by-step explanation:

For 14 the only remaining angle is over 90

For 15 the first triangle has all same side and angle measures

second triangle has 2 equal side measures

and third has none

Answer:

1: Obtuse

2: A

Step-by-step explanation:

One angle is 57° and another is 12°. If we add them, we get 69. Subtract 69 from 180 to get missing angle: 180-69=111

the missing angle is 111°. We know this is not a right triangle because those have a 90° angle. Since one angle is bigger than 90 (111°), the triangle is obtuse.

For the second one, we see that the first triangle is equal on all sides, so it is equilateral. The second triangle has just two equal sides, so it is isosceles. The thrid one is different side length on all of them, so it is scalene. the answer is A.

Nikolai was curious if he could predict how many "likes" an internet video received based on how many views the video had. He took a random sample of videos and noticed a positive linear relationship between number of views and number of likes (both in thousands). Here is computer output from a least-squares regression analysis on his data:

Which of these is an appropriate least-squares equation for this model?

Answers

Answer:

likes

=0.420+0.034(views) (B) on khan academy

Step-by-step explanation:

25x+20y=200 in slope intercept form.​

Answers

Answer:

5x+4y-40=0

Step-by-step explanation:

Gina and Rhonda work for different real estate agencies. Gina earns a monthly salary of $5,000 plus a 6% commission on her sales. Rhonda earns a monthly salary of $6,500 plus a 4% commission on her sales. How much must each sell to earn the same amount in a month?

Answers

Answer: Gina and Rhonda work for different real estate agencies. Gina earns a monthly salary of $5,000 plus a 6% commission on her sales. Rhonda earns a monthly salary of $6,500 plus a 4% commission on her sales. How much must each sell to earn the same amount in a month?

Step-by-step explanation:

$5,000 + 6% + $6,500 + 4% = 11500.1 or 11500

HELP ME ASAP PLEASE!!!!! LOOK AT SCREENSHOT (10 PTS)

Answers

Answer: i would say A and D but i'm not sure of the others


How much Interest(in dollars) is earned by Investing $2200 at a simple interest rate of 8% for 12 years? Write the correct answer.

Answers

A = $4,312.00

I = A - P = $2,112.00

hey!

Equation:

A = P(1 + rt)

Calculation:

First, converting R percent to r a decimal

r = R/100 = 8%/100 = 0.08 per year.

Solving our equation:

A = 2200(1 + (0.08 × 12)) = 4312

A = $4,312.00

The total amount accrued, principal plus interest, from simple interest on a principal of $2,200.00 at a rate of 8% per year for 12 years is $4,312.00.

-------------------------------------------------

have a good day! hope i helped in some way

A bag contains x counters. 7 of the counters are blue. Sam takes at random a counter from the bag and does not replace it. Jill then takes a counter from the bag. The probability they both take a blue counter is 0.2. Form an equation involving x, in the form x + bx +c=0.

Answers

Answer:

0.2x² - 0.2x - 42 = 0

Step-by-step explanation:

Number of counters = x

Number of blue counters =7

Probability, p = required outcome / Total possible outcomes

P(Sam picks blue ) : = 7/x

P(jill picks blue) = 6/(x - 1)

P(Sam picks blue) * P(Jill picks blue) = 0.2

7/x * 6/(x-1) = 0.2

42/x(x - 1) = 0.2

42 / x² - x= 0.2

42 = 0.2(x² - x)

42 = 0.2x² - 0.2x

0.2x² - 0.2x - 42

What is the percent of 0.875?

Answers

Answer:

87.5%

Step-by-step explanation:

Just move the decimal place twice to the right.

Answer:

87.5%

Step-by-step explanation:

0.875× 100= 87.5%

x(x-4)=12 solve for x​

Answers

Answer:

x=6 and x=-2

Step-by-step explanation:

so

x(x-4)=12

first distribute

then move the terms

and the u get

x=6 and x=-2

hope this helped

Answer:

x=6, x=-2

Step-by-step explanation:

x(x-4)=12

distributive property, x^2-4x=12

x^2-4x-12=0

(x-6)(x+2)

therefore, x=6, x=-2

the expression 8+2t can be used to find the total cost of admission and t amusement rides at a country fair. what statement is true?

Answers

the anwser is going to be A

What is the value of 9x^2 + 13x – 15, if x = 2

Answers

Step-by-step explanation:

Given,

[tex]9 {x}^{2} + 13x - 15[/tex]

and

[tex]x = 2[/tex]

Substitute x = 2 into expression.

[tex]9 {x}^{2} + 13x - 15 = 9( {2}^{2} ) + 13(2) - 15 \\ = 9(4) + 26 - 15 \\ = 36 + 26 - 15 \\ = 62 - 15 \\ = 47[/tex]

Answer:

9(2)×2+13(2)-15

18×2+26-15

36+11

47 is your answer ☺️☺️☺️

help please! need an answer asap................

Answers

Answer:

x ≈ 121.2 ft

Step-by-step explanation:

Using the tangent ratio in the right triangle

tan60° = [tex]\frac{opposite}{adjacent}[/tex] = [tex]\frac{x}{70}[/tex] ( multiply both sides by 70 )

70 × tan60° = x , then

x ≈ 121.2 ft ( to 1 dec. place )

SURFACE AREA!!
can someone please help me get the answer on these two I’m stuck

Answers

Answer:

96 i think :)

Step-by-step explanation:

15x4=60

6x6=36

60+36=96

plz help, i give brainliest

Answers

Answer:

A

Step-by-step explanation:

A square has a perimeter of 36 inches and a smaller square has a side length of 4 inches. What is the ratio of the areas of the larger square to the smaller square?

Answers

Answer:

3:2

Step-by-step explanation:

a square has the same side lengths so just √36 = 6 to find the sides of the squares then compare the two sides in ratio form 6:4 then reduce

i believe the asnwer will be. : 3:2
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Which database item would show details such as a customers name, their last purchase, and other details about a customer?A. fileB. fieldC. recordD. tableE. index Explain the mistake you see in image 1 Which of the following statements is FALSE?a.Increasing the sensitivity of managers compensation to firm performance can have negative effects.b.In all countries, the central conflict in corporate governance is the agency conflict between shareholders and managers.c.A captured board usually can not monitor the management effectively.d.The separation of ownership and control in a corporation has benefits and costs. PLEASEEEEEEEEEEEEEEE HELPPPPPPPPPPPPPPPPPPPPPPP please help me with all i will give 40 extra points if you answer all of the question for me and brainliest plus 5 stars if the answer you put is absurd i will repo you thanks which statement about islam is not true A. Muslims are fast for one month each year at Ramadan B. Muslims are not required to share their wealth with those less fortunateC. Muslims should try to make a pilgrimage to mecca in their lifetimeD. Muslims are expected to pray five times a daygive me the right answers or ill k-l- you describe a time when you learned how to adjust to new people or a new place In elephants, poofy tails (T) are dominant to scraggly tails (t) A poofy tailed mother is matedwith a scraggly tailed bull. Since elephants do not have a large amount of offspring, theyproduced two puffy tailed calves. all of the following are ways to increase diversity in organizations except:expand recruitment efforts.promote underrepresented groups without regard for performance.provide personal coaching.encourage employee resource groups. warm air rises at the equator and cold air sinks at the poles creatingA. tornadoes B. hurricanes C. convection currentsD. the coriolis effect 1. In what ways did religious participation grow in the US in the 1800s? Can you help me I forgot The arrows in the picture below show several ways heat is transferred from the Sun as it strikes sand on the surface of a beach. Which arrow shows convection?A.1B.2C.3D.4 I NEED HELP REALLY FAST! Find the measure of the missing angles. HELP please please dont skip peaeeeeeeeeeHow was the Mendez family different from many other Mexican Americans working in California at the time? An incoming college student took her colleges placement exams in French and mathematics. In French, she scored 85 and in math 80. The overall results for both exams are approximately normal. The French mean score was 72 with a standard deviation of 12, while the mean math score was 70, with a standard deviation of 7.8. On which exam did she do better compare with the other incoming college students? Compute the z-scores (round to 2 decimal places) and the percentiles (round to the nearest whole) for each exam to support your answer. Which technique would the nurse suggest to a laboring woman's partner? Solve. Write or draw to explain. Amy has 12 stickers. Jen has 9 stickers. They place 7 stickers on each page of a book. How many pages are in the book? Math Spot thpicks what is the best approximation for the area of this circle? use 3.14 to approximate pi. responses a.12.6 m b.25.1 m c.50.2 m d.158.0 m Discuss sounds of music in the 21st centuryList all the composers/artistsSelect three names that you don't know.Next to each name, write a few sentences about them and their music.List and describe (using 2 or 3 sentences) six words or terms you are unfamiliar with (ie, minimalism)