Write a short paragraph about correlation coefficient. Describe what it is, how to find it, what it looks like, and how it is used.
The correlation coefficient is a statistical measure that indicates the strength and direction of the relationship between two variables.
Correlation coefficient is denoted by the symbol "r" and ranges from -1 to 1.
A correlation coefficient of 1 indicates a perfect positive correlation, where as one variable increases, the other variable also increases at the same rate.
A correlation coefficient of -1 indicates a perfect negative correlation, where as one variable increases, the other variable decreases at the same rate.
A correlation coefficient of 0 indicates no correlation between the two variables.
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Starting at the same point Tom and Juanita goes biking in opposite directions if Tom rides at the speed of 30mph and Tom rides at the speed 30mph how far apart will they be in 3 hours
Starting from the same point when bike riding, two individuals are riding. Tom and Juanita goes on biking in opposite directions to each other. Tom rides at speed of 30 mph and Juanita rides at speed of 30 mph in one hour. This will both be added together. And later will be add both speed in third hour that gives us the final value. The answer of this will be seventy two miles.
[tex]30+30[/tex] in one hour
[tex]30+30[/tex] in second hour
[tex]30+30[/tex] in the third hour
[tex]\boxed{\bold{= 270 \ miles}}[/tex]
Jazmin and Justine went shopping for back to chool clothes. Jazmin purchasrd three shirts and one pair of shorts ans spent $38. 0. Justine bought four shirts and three pairs of shorts and spent $71. 50.
Part A: Assumibg all the shirts cost the same amount and all the shorts cost the same amount, write a system os equations to represent each girl's shoppins spree
Part B: Use the elimination method to solve for the price of one pair of shorts
The equations to represent each girl's shoppins spree is 3x + y = 38.0 and 4x + 3y = 71.50. Price of one shirt costs $8.50 and price of one pair of shorts costs $12.50.
Let x be the price of one shirt, and y be the price of one pair of shorts. Then, we can write the following system of equations
For Jazmin
3x + y = 38.0
For Justine
4x + 3y = 71.50
To solve for the price of one pair of shorts using elimination method, we need to eliminate one of the variables. We can do this by multiplying the first equation by 3 and the second equation by -1, and then adding them together
9x + 3y = 114.0
-4x - 3y = -71.50
5x = 42.50
x = 8.50
So, one shirt costs $8.50.
To find the price of one pair of shorts, we can substitute the value of x into either of the original equations and solve for y. Using the first equation
3(8.50) + y = 38.0
25.50 + y = 38.0
y = 12.50
Therefore, one pair of shorts costs $12.50.
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Ana dives into a pool off of a springboard high dive.
Her height (in meters above the water), seconds after diving, is modeled by
h(x)=−5(x+1)(x−3)h, left parenthesis, x, right parenthesis, equals, minus, 5, left parenthesis, x, plus, 1, right parenthesis, left parenthesis, x, minus, 3, right parenthesis
How many seconds after diving will Ana hit the water?
Ana will hit the water 3 seconds after diving.
To find when Ana will hit the waterWe need to solve for when her height is 0. We can set h(x) = 0 and solve for x:
-5(x+1)(x-3) = 0
This expression equals zero when either (x+1) = 0 or (x-3) = 0. Solving for these values gives:
x+1 = 0 or x-3 = 0
x = -1 or x = 3
The negative value for x doesn't make sense in this context since it represents a time before Ana even jumped off the board, so we can ignore it.
Therefore, Ana will hit the water 3 seconds after diving.
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if we know that t.05= 1.812 when df = 10, then it is correct to say
Knowing that t.05 = 1.812 when df = 10 helps us to determine the critical value of t for hypothesis testing in this scenario.
If we know that t.05 = 1.812 when df = 10, then it is correct to say that the critical value of t at the 5% significance level for a two-tailed test with 10 degrees of freedom is 1.812.
The t-distribution is a family of probability distributions that depend on the sample size and the degrees of freedom (df). The degrees of freedom represent the number of independent observations available to estimate the population parameters. In this case, when df = 10, the t-distribution has thicker tails compared to the standard normal distribution.
The value t.05 represents the critical value of t at the 5% significance level (or alpha level) in a two-tailed test. This means that if the calculated t-value falls outside the range of -t.05 to +t.05, then the null hypothesis can be rejected.
Therefore, knowing that t.05 = 1.812 when df = 10 helps us to determine the critical value of t for hypothesis testing in this scenario.
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This means that for a t-distribution with 10 df, 95% of the data lies within ±1.812 standard deviations from the mean.
If we know that t.05= 1.812 when df = 10,
then it is correct to say that the probability of obtaining a t-value greater than
1.812 or less than -1.812 is 0.05,
assuming a two-tailed test and a significance level of 0.05.
This means that if we calculate the t-value for a sample with 10 degrees of freedom and the calculated t-value falls
outside the range of -1.812 to 1.812,
we can reject the null hypothesis at the 0.05 significance level.
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Solve the inequality for the variable: 2(3c + 15) + 4c > 100
Answer:
c > 7
Step-by-step explanation:
Now we have to,
→ Find the required value of c.
The equation is,
→ 2(3c + 15) + 4c > 100
Then the value of c will be,
→ 2(3c + 15) + 4c > 100
Applying Distributive property:
→ 2(3c) + 2(15) + 4c > 100
→ 6c + 30 + 4c > 100
Combining the like terms:
→ 10c + 30 > 100
→ 10c > 100 - 30
→ 10c > 70
Dividing the value 70 with 10:
→ c > 70 ÷ 10
→ [ c > 7 ]
Hence, the answer is c > 7.
Hello !
Answer:
[tex]\boxed{\sf c > 7 \ \ \ ||\ \ \ \sf (7,+\infty)}[/tex]
Step-by-step explanation:
We are looking for the values of c that satisfy the following inequality :
[tex]\sf 2(3c + 15) + 4c > 100[/tex]
Let's expand the left side of the inequality.
[tex]\sf 2\times 3c +2\times 15+4c > 100\\6c+30+4c > 100[/tex]
Now we will combine like terms :
[tex]\sf 10c+30 > 100[/tex]
Let's substract 30 from both sides of the inequality.
[tex]\sf 10c+30-30 > 100-30\\10c > 70[/tex]
Finally, let's divide both sides by 10.
10>0 so the inequality remains the same.
[tex]\sf\frac{10c}{10} > \frac{70}{10} \\\boxed{\sf c > 7}[/tex]
Have a nice day ;)
1.6 Give a reason why the bank is legible to charge service fees?
Answer:
Banks are eligible to charge service fees to cover the costs of providing and maintaining various banking services such as account maintenance, ATM access, online banking, and customer support. These fees help banks to generate revenue and continue to offer their services to customers. The specific fees and their amounts can vary depending on the bank and the type of account or service being used.
Area use a 7. 2 pans of blue pink and white paint to paint her bedroom walls 1/4 of this month is blue pants and the rest is wipe it how many pensive white paint did you use to paint her bedroom walls
If 1/4 of this amount is blue paint, and the rest is white paint, Area used 5.4 pints of white paint to paint her bedroom walls.
Given that Area used a total of 7.2 pints of blue and white paint to paint her bedroom walls. And 1/4 of the amount is blue paint, then the remaining 3/4 of the amount must be white paint.
To find the amount of white paint used, we can use the following formula:
Amount of white paint = Total amount of paint - Amount of blue paint
Since we know that the total amount of paint used is 7.2 pints and 1/4 of that amount is blue paint, we can calculate the amount of blue paint as:
Amount of blue paint = (1/4) x 7.2 = 1.8 pints
Now we can substitute these values in the formula to find the amount of white paint used:
Amount of white paint = 7.2 - 1.8 = 5.4 pints
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What is the volume and total surface area of each shape combined?
The volume and total surface area of each shape combined is calculated below.
How to find the volume and total surface area of each shape combined?For cone-hemisphere shape
Volume = volume of cone + volume of hemisphere
Volume = 1/3πr²h + 2/3πr³
where r = 9/2 = 4.5 m
h = √(13² - 4.5²) (Pythagoras)
h = 12.20 m
Volume = 1/3πr²h + 2/3πr³
Volume = (1/3 * 3.14 * 4.5² * 12.2) + (2/3 * 3.14 * 4.5³)
Volume = 449.33 m³
Surface area = curved surface area of cone + curved surface area of hemisphere
Surface area = πrl + 2πr², where l = 13 m
Surface area = (3.14 * 4.5 * 13) + (2 * 3.14 * 4.5²)
Surface area = 310.86 cm²
For hemisphere-cylinder shape
Volume = volume of hemisphere + volume of cylinder
Volume = 2/3πr³ + πr²h
where r = 22/2 = 11 ft
height of cylinder (h) = 45 - 11 = 34 ft
Volume = (2/3 * 3.14 * 11³) + (3.14 * 11² * 34)
Volume = 15704.19 ft³
Surface area = curved surface area of hemisphere + curved surface area of cylinder + curved surface area circular base of cylinder
Surface area = 2πr² + πr² + 2πrh
Surface area = 3πr² + 2πrh
Surface area = (3 * 3.14 * 11²) + (2 * 3.14 * 11 * 34)
Surface area = 3488.54 ft²
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In Apextown there are 320,000 29-year-olds. Based on the table below, how many are not expected to be alive in a year? • A. 422 • B. 419 • C. 315 • D. 485
The number of 29 year olds who are not expected to be alive in a year would be A. 422 people.
What does the table show about Apextown ?We see that in Apextown, the percentage of people who are expected to be alive in a year, based on their ages, is given.
For those who are 29 years of age, we see that the percentage of people who are expected to be alive in a year would be 99. 868 %. This means that the number of 29 year olds who would not be alive would be:
= Number of 29 years x ( 1 - percentage to be alive)
= 320, 000 x ( 1 - 99. 868 % )
= 320, 000 x 0. 00132
= 422. 4
= 422 people
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5. A cylinder has radius 3 inches and height 5 inches. A cone has the same radius and height. (Lesson 5-13)
b. Find the volume of the cone.
c. What fraction of the cylinder's volume is the cone's volume?
see the scatter plot of Wins compared to Free Throw Attempts per Game.
Then use the scatterplot to write your line of best fit and determine the correlation.
I'm confused what's being asked here...but if you're looking for someone to check it then:
The line of best fit is drawn correctly; there are about the same amount of dots on the top and bottom of the line.
And the correlation is positive
48 students took an arithmetic test. If 36 students passed the test, what percent of students have passed? Show your work using the
scratchpad.
The percentage of the students who passed the test is
9 divided 7/3
sdfghjkl;lkjhgfdsaedrtyujiuhgfd
The result of 9 divided by 7/3 is 12 3/7.
What is the result of 9 divided by 7/3?When dividing by a fraction, it's the same as multiplying by its reciprocal. Therefore, to divide 9 by 7/3, we can multiply 9 by 3/7. This gives us (9 x 3) / 7 = 27/7.
However, this fraction can be simplified by dividing both the numerator and denominator by their greatest common factor, which is 3.
Thus, 27/7 can be simplified to 9 and 6/7, or 12 and 3/7 when expressed as a mixed number. Therefore, the answer to 9 divided by 7/3 is 12 and 3/7.
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if a cube numbered 1 to 6 is tossed 300 times, about how many times would you predict the cube to land on a number greater than 4?
Answer: 100 times
Step-by-step explanation:
The cube is numbered 1 to 6. That is, 1, 2, 3, 4, 5, 6. That means there are 6 possible outcomes for each toss. But there are 2 outcomes we want, 5 and 6 (greater than 4).
So, for each toss, there is a probability of 2/6 = 1/3 that this will occur.
With 300 tosses, we can say that this will probably happen 300 times. This means that it will happen
1/3 * 300 times = 100 times.
Therefore, we can predict we will get a 5 or 6 about 100 times.
Use #18 to then find how much it costs to paint the room if the paint costs 8$ a gallon and each gallon covers 300 ft of wall
The cost to paint the room with two coats of paint is $48, using paint that costs $8 per gallon and covers 300 square feet per gallon.
To determine how much it costs to paint the room if the paint costs $8 a gallon and each gallon covers 300 square feet of wall, we first need to determine how many gallons of paint we need. From problem #18, we know that the room has a total wall area of 800 square feet, and we need to apply two coats of paint.
The total wall area that needs to be covered by paint is:
800 square feet x 2 coats = 1600 square feet
To determine how many gallons of paint we need, we divide the total square footage by the coverage of one gallon of paint:
1600 square feet ÷ 300 square feet/gallon = 5.33 gallons (rounded up to the nearest gallon)
Therefore, we need 6 gallons of paint to complete the job (since we can't purchase a fractional amount of a gallon).
The cost of the paint can now be calculated by multiplying the number of gallons of paint by the cost per gallon
6 gallons x $8/gallon = $48
So it would cost $48 to paint the room.
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Please help me I cannot do this (BUT it might be easy for u if ur an expert) B]
Answer:
a
Step-by-step explanation:
Answer:
The answer is B) -35.16 grams per half-life cycle
The question is: Emily sold 56 of the 145 bracelets. What percent of the bracelets did she sell? Show your strategy.
Answer:
[tex]percentage = \frac{56}{145} \times 100[/tex]
56/145×100
0.386...×100
38.6%
Solve for length of segment c.
3 cm
12 cm
18 cm
C = [?] cm
If two segments intersect inside
or outside a circle: ab = cd
The value of c for the intersecting secants is derived to be equal to 2 cm
What is the intersecting secant theoremThe intersecting secant theorem, also known as the secant-secant theorem, states that when two secant lines intersect outside a circle, the product of the length of one secant segment and its external segment is equal to the product of the length of the other secant segment and its external segment.
c × 18 cm = 3 cm × 12 cm
c18 cm = 36 cm²
c = 36 cm²/18 cm
c = 2 cm
Therefore, the value of c for the intersecting secants is derived to be equal to 2 cm.
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Answer:
c=2cm
Step-by-step explanation:
ab=cd
3•12=18•c
36=18(c)
36/18=2
18(c)=c
c=2
What is the area of the shaded region in the figure below? (7.G.6)
Answer:
The area of the shaded region is 21 square units.
7 × 3 = 21 square units
The diameter of a circle is 18 inches. What is the area of a sector bounded by a 30° arc?
Answer: [tex]6.75\pi[/tex] inches^2
Step-by-step explanation:
If the diameter is 18 inches, the radius must be 18/2 = 9 inches.
Thus, we can calculate the area using the area of a circle = [tex]\pi r^{2}[/tex].
Plugging in the values, we get the area = [tex]81\pi[/tex] inches^2.
Since 30 degrees is 1/12 of 360 degrees, a 30-degree sector would be equal to 1/12 the area of the circle.
Therefore, we divide [tex]81\pi[/tex]/12 to get the area of the sector = [tex]6.75\pi[/tex] inches^2.
What is the area of each shape?
Answer:
19.25
Step-by-step explanation:
You add up all three sides which would be 10+3.25+6 to get the awnser 19.25
USE A MODEL In a mathematics exam with a maximum score of 100, Machelle loses less than 27 points. The table shows the grade that matches the exam score. Compare points to grades and identify which grade Machelle can get.
Machelle can get a grade of D or higher on her exam.
Describe Inequality?In mathematics, an inequality is a mathematical statement that describes a relationship between two quantities that are not necessarily equal. An inequality can express that one quantity is less than, less than or equal to, greater than, greater than or equal to, or not equal to another quantity.
Inequalities can be represented using various symbols. For example, the symbol < represents "less than," the symbol > represents "greater than," the symbol ≤ represents "less than or equal to," and the symbol ≥ represents "greater than or equal to." The symbol ≠ represents "not equal to."
Inequalities are also used in algebra to solve equations and to represent the solution set of an equation. In this context, an inequality can represent all the possible values of a variable that satisfy the equation. For example, the inequality x > 5 represents all the values of x that make the expression x - 5 positive.
We can write an inequality to represent the number of points, m, obtained by Machelle on her exam:
m > 100 - 27
Simplifying this expression, we get:
m > 73
This means that Machelle must have scored more than 73 points on her exam. Based on the table, we can see that a score of more than 73 points corresponds to a grade of at least a D. Therefore, Machelle can get a grade of D or higher on her exam.
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The complete question is:
Find the quotient. Assume that no denominator has a value of 0.
5x^2/7÷10x^3/21
The quotient of the expression 5x^2/7÷10x^3/21 is 3/(2x)
Finding the quotient of the expressionFrom the question, we have the following parameters that can be used in our computation:
5x^2/7÷10x^3/21
Assume that no denominator has a value of 0, we have
5x^2/7÷10x^3/21 = 5x^2/7 ÷ 10x^3/(7 * 3)
Express as products
So, we have the following representation
5x^2/7÷10x^3/21 = 5x^2/7 * (7 * 3)/10x^3
When the factors are evaluated, we have
5x^2/7÷10x^3/21 = 5 * 3/10x
So, we have
5x^2/7÷10x^3/21 = 15/10x
This gives
5x^2/7÷10x^3/21 = 3/(2x)
Hence, the solution is 3/(2x)
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A cone has a radius of 6 m and a height of 24 m. What is the volume of the cone in terms of π? 864π m3 432π m3 288π m3 144π m3
The volume of the cone in terms of π is 288π cubic meters, which corresponds to option (c) in the given answer choices.
The formula for the volume of a cone is:
V = (1/3)πr^2h
where V is the volume, r is the radius, and h is the height of the cone.
Plugging in the given values, we get:
V = (1/3)π(6 m)^2(24 m)
V = 288π m^3
Therefore, correct option is C.
This is because π is an irrational number that cannot be expressed as a finite decimal or fraction, so any approximation would be less precise than the exact value in terms of π.
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what do parallel and perpendicular cross sections of a sphere look like?
Parallel cross sections of a sphere look like circles with the same radius as the sphere, while perpendicular cross sections look like points. Cross sections taken at other angles will be ellipses.
What you understand by sphere?A sphere is a three-dimensional geometric shape that is perfectly round in shape, like a ball. It is defined as the set of all points in three-dimensional space that are at a constant distance (the radius) from a given point called the center.
If we take a cross section of a sphere, the resulting shape will depend on the angle at which the section is taken relative to the center of the sphere.
If we take a plane that is parallel to the base of the sphere, the cross section will be a circle with the same radius as the sphere. This is because the intersection of the plane with the sphere will be a circle, and since the plane is parallel to the base of the sphere, the circle will have the same radius as the sphere.
On the other hand, if we take a plane that is perpendicular to the base of the sphere, the cross section will be a point. This is because the plane will intersect the sphere at only one point, which is the point at which the plane is perpendicular to the sphere.
If we take a plane that is neither parallel nor perpendicular to the base of the sphere, the resulting cross section will be an ellipse. The size and shape of the ellipse will depend on the angle at which the plane intersects the sphere.
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please give a step by step ASAP
The correct option is the fourth one, the slope and y-intercept are different.
Which statement is correct?Here we have the linear equation:
3x - 5y = 4
We know that it is dilated by a scale factor of 5/3, so let's find the dilation.
We can rewrite the linear equation as:
-5y = 4 - 3x
y = (3/5)x - 4/5
Now let's apply the dilation:
y = (5/3)*[ (3/5)x - 4/5]
y = x - 4/3
Then we can see that the slope and the y-intercept are different, the correct option is 4.
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What are the coordinates of F' and G' for D(6.(2,5)) [F (3,11), G (2,8)]?
Answer: To find the coordinates of F' and G', we need to reflect points F and G across the line y = 5, since point D is located on this line.
For point F, the y-coordinate changes from 11 to -1, since the distance between the line y = 5 and point F is 6 units (2 times the distance between D and the line). Therefore, the coordinates of F' are (3,-1).
For point G, the y-coordinate changes from 8 to 2, since the distance between the line y = 5 and point G is 3 units (1.5 times the distance between D and the line). Therefore, the coordinates of G' are (2,2).
Thus, the coordinates of F' are (3,-1) and the coordinates of G' are (2,2).
What is 10/9 minus negative 1 1/3 equal?
hi
10/9 - 11/3 = 10/9 - 33/9 = -23/9
Answer:
-23/9
Step-by-step explanation:
You would need to find a common denominator which would be 9.
The next step would be to combine the top 10-11 (times)3 over 9
Then you multiply -11 by 3 tp get 10 -33 /9
The last and final step would be tp subract 33 from 10 to get 33 -10
Which will led you to your final awnser which is -23/9
what value of c is such that 99% of all parcels are at least 1 lb under the surcharge weight? (round your answer to four decimal places.)
the value of c is 11.165 lbs. This was calculated using the z-score formula, assuming a normal distribution with a mean weight of 10 lbs and a standard deviation of 0.5 lbs. This ensures that 99% of all parcels are at least 1 lb under the surcharge weight.
To find the value of c, we need to use the standard normal distribution and the z-score formula. Since we know that 99% of all parcels are at least 1 lb under the surcharge weight, we can use the z-score associated with the 99th percentile, which is 2.33 (from a z-score table).
The formula for the z-score is:
z = (x - μ) / σ
where x is the weight of the parcel, μ is the mean weight, and σ is the standard deviation.
In this case, we want to find the weight of the parcel that is at the 99th percentile, which is 1 lb under the surcharge weight. Let's call this weight x. We know that the surcharge weight is c, so the weight of the parcel that is 1 lb under the surcharge weight is (c - 1).
Using the z-score formula and substituting the values we know, we get:
2.33 = ((c - 1) - μ) / σ
We want to solve for c, so we need to rearrange the equation:
c - 1 = 2.33σ + μ
c = 2.33σ + μ + 1
We don't know the values of μ and σ, but we can use the fact that the distribution is normal to estimate them. We can assume that the distribution is centered at the mean weight of all parcels, and that the standard deviation is equal to the average difference between the weight of each parcel and the mean weight.
Let's say that the mean weight is 10 lbs, and the standard deviation is 0.5 lbs. Then, we can plug these values into the equation for c:
c = 2.33(0.5) + 10 + 1
c = 11.165
So, the value of c that ensures that 99% of all parcels are at least 1 lb under the surcharge weight is approximately 11.165 lbs.
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