A study was designed to compare the attitudes of two groups of nursing students towards computers. Group 1 had previously taken a statistical methods course that involved significant computer interaction. Group 2 had taken a statistic methods course that did not use computers. The students' attitudes were measured by administering the Computer Anxiety Rating Scale (CARS). A random sample of 12 nursing students from Group 1 resulted in a mean score of 59.7 with a standard deviation of 2.8. A random sample of 15 nursing students from Group 2 resulted in a mean score of 64.7 with a standard deviation of 8.3. Can you conclude that the mean score for Group 1 is significantly lower than the mean score for Group 2? Let µ1 represent the mean score for Group 1 and µ2 represent the mean score for Group 2. Use a significance level of α = 0.1 for the test. Assume that the population variances are equal and that the two populations are normally distributed.Step 1: State the null and alternative hypotheses for the test.Step 2: Compute the value of the t test statistic. Round your answer to three decimal placesStep 3: Determine the decision rule for rejecting the null hypothesis H0. Round your answer to three decimal places. Reject or fail to reject your hypothesis?

Answers

Answer 1

Answer:

Kindly check explanation

Step-by-step explanation:

Given the following :

Group 1:

μ1 = 59.7

s1 = 2.8

n1 = sample size = 12

Group 2:

μ2 = 64.7

s2 = 8.3

n2 = sample size = 15

α = 0.1

Assume normal distribution and equ sample variance

A.)

Null and alternative hypothesis

Null : μ1 = μ2

Alternative : μ1 < μ2

B.)

USing the t test

Test statistic :

t = (m1 - m2) / S(√1/n1 + 1/n2)

S = √(((n1 - 1)s²1 + (n2 - 1)s²2) / (n1 + n2 - 2))

S = √(((12 - 1)2.8^2 + (15 - 1)8.3^2) / (12 + 15 - 2))

S = 6.4829005

t = (59.7 - 64.7) / 6.4829005(√1/12 + 1/15)

t = - 5 / 2.5108165

tstat = −1.991384

Decision rule :

If tstat < - tα, (n1+n2-2) ; reject the Null

tstat < t0.1,25

From t table :

-t0.1, 25 = - 1.3163

tstat = - 1.9913

-1.9913 < - 1.3163 ; Hence reject the Null


Related Questions

Help ? anybody ion know any of these I’m sorry please give me the correct answer .

Answers


Since we have the answers, we can just go through the numbers and substitute them for x and see if we get 23.

Starting with your answer, you said the answer was 3.

If we substitute all the x’s with 3, then we end up with 23 if we add all the sides.

(This means your original answer, 3 , is correct.)

1. Which inequality represents the following statement? Two times the quantity x plus 4 is greater than 10.

a.2x + 4 > 10
b.2(x + 4) > 10
c.x+4 > 10
d.2(x + 4) = 10​

Answers

The second one most likely if gt means greater than

slove the equation
7h-5(3h-8)=-72

Answers

Answer:

Step-by-step explanation:

You can break it down into steps if you'd like.

-5 ( 3h - 8) = -15h + 40

So,

7h - 5 ( 3h -8 ) = -72

7h - 15h + 40 = -72

Now you can combine the like terms

-8h + 40 = -72

Add 8h to both sides

40 = -72 + 8h

Add 72 to both sides

40 + 72 = 8h

112 = 8h

Divide both sides by 8 to find h.

h = 112/8 = 14

h = 14. Is the answer

g(f(x)) easy hw question

Answers

Answer:

b

Step-by-step explanation:

-2x⁴-x³+2x²-6

hope this helps

NEED HELP FAST I WILL MARK BRAINLYEST

Answers

Answer:

13/48

Step-by-step explanation:

13/6 / 8 = 13/6 x 1/8

13 x 1 = 13

6 x 8 = 48

13/48

Answer:

13/48

Step-by-step explanation

Can someone please help me?

Answers

Answer:

232.05

Step-by-step explanation:

find out how much it started out with

so divide 46dollars and 50 cents by 3

then you'll have 15dollars and 5 cents

now you know thats how much earned at first you multiply by 15 and you get the answer above

good luck

What relations, if any, are functions? Select all that apply.

Answers

ayooooo the functions: a and d.

hellllllllllllllllllp​

Answers

Answer:

Step-by-step explanation:

Its b

Answer:

D

Step-by-step explanation: common sence because when it 5 and the little 2

would be 5 times 5 BUT 5 and the little 4 would be 5 times 5 times 5 times 5 so which if you add those u get 5 times etc u get the point

3. Evaluate the expression 18
7+2 - 4
a. 2
b. 1.4
c. 6
d. 18

Answers

The correct answer is A

f(x) = x² + x; f(1)??

Answers

Fx^2+x
Pls mark brainliest

Find value of x, first gets brain

Answers

Answer:

53

Step-by-step explanation:

The graph shows the balance of an account that is earning interest over time. In which year was the account balance about $150? ​

Answers

Answer:

Year 7

Step-by-step explanation:

Hopefully this is helpful.

Answer:

ik im late and the other person was right but theres proof for the newcomers :)

Step-by-step explanation:

Evaluate the following expression.
50÷ 5^2×2

Answers

50/5^2 x 2
2x2
ANSWER: 4
ANSWER= 4


50/5^2x2
2x2

Ken and Vincent each want to run for president of their school's student body council. In
order to do so, they must collect a certain number of signatures and get a nomination. So far,
Ken has 10 signatures, and Vincent has 30. Ken is collecting signatures at an average rate of
3 per day, whereas Vincent is averaging 2 signatures every day. Assuming that their rate of
collection stays the same, eventually the two will have collected the same number of
signatures. How long will that take?
00
Write a system of equations, graph them, and type the solution.
Sn

Answers

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

Find the probability that a person is audited more than twice. (Round your answer to four decimal places.)

Answers

Complete Question

The chance of an IRS audit for a tax return with over $25,000 in income is about 2% per year. We are interested in the expected number of audits a person with that income has in a 9-year period. Assume each year is independent.

Find the probability that a person is audited more than twice. (Round your answer to four decimal places.)

Answer:

The probability is  [tex]P(X > 2) = 0.0007 [/tex]

Step-by-step explanation:

From the question we are told that

The  probability of an IRS audit for a tax return with over $25,000 in income is p= 0.02

The sample size  n  =  9

Generally the distribution of IRS audit for a tax return follows a binomial distribution  

i.e  

         [tex]X  \~ \ \ \  B(n , p)[/tex]

and the probability distribution function for binomial  distribution is  

      [tex]P(X = x) =  ^{n}C_x *  p^x *  (1- p)^{n-x}[/tex]

Here C stands for combination hence we are going to be making use of the combination function in our calculators  

 

Generally the probability that a person is not audited at all is mathematically

     [tex]P(X = 0) =  ^{9}C_0 *  (0.02)^0 *  (1- 0.02 )^{9-0}[/tex]

      [tex]P(X = 0) =  ^{9}C_0 *  (0.02)^0 *  (0.98 )^{9-0}[/tex]

       [tex]P(X = 0) =  0.8337[/tex]

Generally the probability that a person is  audited once  is mathematically

           [tex]P(X = 1) =  ^{9}C_1 *  (0.02)^1 *  (1- 0.02 )^{9-1}[/tex]

           [tex]P(X = 1) =  9*  (0.02)^1 *  (0.98 )^{8}[/tex]

            [tex]P(X = 1) =  0.1531[/tex]

Generally the probability that a person is  audited twice is mathematically represented

           [tex]P(X = 2) =  ^{9}C_2 *  (0.02)^2 *  (1- 0.02 )^{9-2}[/tex]

           [tex]P(X = 2) =  36 *  (0.02)^2 *  (0.98 )^{7}[/tex]

            [tex]P(X = 2) =  0.0125 [/tex]

Generally the probability that a person is audited more than twice is mathematically represented

     [tex]P(X > 2) =  1 - [P(X = 0 ) + P(X = 1 )+ P(X =2)] [/tex]

=>    [tex]P(X > 2) =  1 - [0.8337 + 0.1531+0.0125 ] [/tex]

=>    [tex]P(X > 2) = 0.0007 [/tex]


The marching band walks mile in 2.5 minutes. At this rate, how many minutes will it take to complete 1 mile? Record your answer below.

Answers

Answer:

2.5 minutes

Step-by-step explanation:

The answer is given in the word problem.

help! for 22 points

Answers

Answer:for a is (x,y) = (1, -5)

B is (x,y) ∈∅

And lastly is c is (x, y) = ( x , 1 - 7x), x∈

Step-by-step explanation:

for a is (x,y) = (1, -5)

B is (x,y) ∈∅

And lastly is c is (x, y) = ( x , 1 - 7x), x∈

2(4x − 3) = 5x − 3(x − 4)

Answers

Answer:  x=3

Step-by-step explanation:

x=3 if you isolate the variable (x) by dividing each side by factors that don’t contain the variable.

Think about the proportion and the cross products for this problem:

Shelley sold one customer 5 peanut butter biscuits for $3. She sold another customer 7 beef treats for $4.20.

Answers

Answer:

The ratios are equivalent

The ratios are a proportion

10 pol
Mariska draws a red card and then a black card. The sum is positive. The
number on the black card must be greater than the number on the red
card. *
True
False

Answers

False, The sum is positive, no subtraction is being done and no negatives are present.

A positive plus a positive is another positive.

HDHSJSJSDVSV HELP ME

Answers

Answer:

let me see the drop box options !! it helps alot!

What did Physics say to History when they are arguing?

Answers

Answer:

Hey!

Here's your answer!!

➡️Don't change the subject⬅️

Why do they even exist!?

Gotta study those experiments which we never perform and those people who are long gone xD

Find the value of 0.4 ´ 0.023

Answers

Answer:

45-0.023=44.977

Step-by-step explanation:

you have three 1 dollar bills and 2 10 dollar bills in your wallet. you select a bill at random

Answers

Answer:

you are more likely to get a 10 dollar bill

Step-by-step explanation:

write an equation to solve for x what is the value of x will mark brainious this is very confusing for me​

Answers

Answer:

equation: 3x - 2 + 4x - 9 + 3x - 9 = 180x = 20

Step-by-step explanation:

add all internal angles

∠H + ∠I + ∠J = 180

where:

∠H = 3x - 2

∠I = 4x - 9

∠J = 3x - 9

plugin the values into the ∠H + ∠I + ∠J = 180 formula:

equation: 3x - 2 + 4x - 9 + 3x - 9 = 180

combine similar terms: 3x + 3x + 4x = 180 + 2 + 9 + 9

simplify: 10x = 200

divide 10 both sides: x = 20

A fudge company makes 4 pounds of fudge. A worker separates the fudge into packages of ¼ of a pound of fudge each. How many packages does he make?

A 1/16

B 1

C 8

D 16

Answers

Answer:

16

Step-by-step explanation:

we are dividing based on the word separate.

4 divided by 1/4 is 16/1 which is 16.

so the worker made 16 packages

Please inform me if there are any questions:)

The number of fudge will be 16. The correct option is D.

What is an expression?

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Given that a fudge company makes 4 pounds of fudge. A worker separates the fudge into packages of ¼ of a pound of fudge each.

We are dividing based on the word separate.

4 divided by 1/4 is 16/1 which is 16.

Number = 4 / ( 1 / 4 )

Number = 16

The worker made 16 packages.

To know more about an expression follow

https://brainly.com/question/15978558

#SPJ2

The graph of a line passes through the two points (-2,1) and (2,1). What is the equation of the line written in general form ?

A. y-1=0
B. x-y+=0
C. x+y -1=0

Answers

Answer:

A

Step-by-step explanation:

When you plot the points (-2,1) and (2,1) on a graph, you get a horizontal lines that crosses through y=1 which can be rearranged to be written as y-1=0

find the length of x

Answers

The correct answer is B

Find 6/11/-3. Write in simplest form

Answers

Answer:

Bit confusing but I'll try my best.

Step-by-step explanation:

6/11 diving by -3.

-2/11.

Anybody Know This. ?

Answers

The last choice would be it because when looking at the triangle you can see that a and b look the same as d and e and same goes with the rest of them just look at the figure to see what goes with what
Other Questions
How long does it take a dropped object to fall 45 meters? what is 234 divided by 21 plz help One night a theater sold 548 movie tickets. An Adults ticket costs $6.50 and a childs ticket cost $3.50. In all $2881 was taken in. How many of each kind of ticket were sold? SOMEONE PLS HELP ME PLEASE I BEG U AND SHOW WHY PLS I BEG How did settlers of ancient Greece adapt to the climate and geography of the mountainous regions?A. They used the mountains for raising sheep and goats.B. They developed cities along the large mountain rivers.C. They developed extensive trade routes through the mountains.D. They used fertile mountain farmland for growing grapes and olives. How will Charlie most likely change after his experience at the diner in part 2 of "Flowers for Algernon"? Write an expression for the nth term of...2,1,0,-1... Would he support or oppose the Manifest Destiny? Why? emily is thinking of a number which she calls n she finds 1/4 of the number and then subtracts by 3 SOMEONE PLEASSEEEE HELPThe greatest common factor of 60w 5y 3 and 78wy 2 is _____6w y^26w^5 y^313w^5 y^32w y^2 If you have a sore throat, dry cough, fever, and chills, what is my diagnosis? What is the Past tense of meet? Rain is falling at 2.00 inches per hour. How many inches have fallen in 6000.0 seconds? During a day a student spends 7 hours sleeping, /4 of the day studying and of the time travelling. What fraction of the day is left for other things? How much heat, in kilojoules, must be added to a 580 g aluminum pan to raise its temperature from 25C to 150C? ---The specific heat capacity for aluminum is 0.897 J/gC. ---Round the answer to two significant figures. True or False we can understand why we see natural resources like copper and gold where they are because we understand under which conditions they formed What is a hypertonic, hypotonic, and isotonic solution? Which inequality represents this situation?Players must practice at least 45 minutes a day. A. t 45 D. t 45 Please answer in a short paragraph for 15 points and a Brainly . What is the meaning and the purpose of the Preamble ? How does Caleb apologize to Maleeka?