1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
a_sh-v [17]
3 years ago
13

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?
Mathematics
1 answer:
trasher [3.6K]3 years ago
5 0

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

You might be interested in
Given the function: f(x) = 2x2 - 3x + 8, find f(-2).
Vaselesa [24]

Answer: 22

<u>Step-by-step explanation:</u>

f(x) = 2x² - 3x + 8

f(-2) = 2(-2)² - 3(-2) + 8

       = 2(4) + 6 + 8

       = 8 + 6 + 8

       = 22

5 0
3 years ago
0.4(.0.3x-1)=2+0.75x
Korolek [52]
This is not a correct equitation
7 0
3 years ago
Read 2 more answers
Which expression represents the perimeter of the model shown below? PLEASE HELP
devlian [24]
P = 2(L)  +2(W)
P = 2(4x+3) + 2(2x)

answer
B. 2(4x+3) + 2(2x)

3 0
3 years ago
Read 2 more answers
To convert 25 minutes to hours, you would use the ratio 1hour/60minutes?
Talja [164]
Idk but it's 0.416667

cuz 25/60 equals so
7 0
3 years ago
Solve each problem by writing and solving an equation
Viktor [21]

Answer:

The anwser would be 51 i think

Step-by-step explanation:

if im right ls makr brainliest

3 0
3 years ago
Other questions:
  • One number is 2 more than 3 times another. their sum is 22. find the numbers. 8, 14
    13·2 answers
  • How does knowing types of acids and bases assist in determining the properties of a compound?
    12·1 answer
  • (stupid answers will get reported)(alots of points)
    11·1 answer
  • When y = 0.4, the value of 10y + 2 is an even number because 10 ⋅ 0.4 + 2 = 6 Write a value for y so that 10y + 2 is a prime num
    9·1 answer
  • Is .325 rational or irrational
    6·2 answers
  • Solve this please, Idk why it’s so hard for me? Thanks!!
    6·2 answers
  • The Liu family buys 20 pounds of chicken at the local market for $50. Which equation can be used to represent the cost,
    10·1 answer
  • <img src="https://tex.z-dn.net/?f=what%20is%20the%20square%20root%20of%2018" id="TexFormula1" title="what is the square root of
    11·1 answer
  • What is the proper to do 81x400
    9·2 answers
  • A bakery offers a sale price of $3.30 for 3 muffins. what is the price per dozen?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!