The test is:   right-tailed two-tailed left-tailed Based on a sample of 65 people, the sample mean GPA was 3.16 with a standard deviation of 0.05 The test statistic is:  (to 2 decimals) The p-value is:  (to 2 decimals) Based on this we: Fail to reject the null hypothesis Reject the null hypothesis

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter9: Sequences, Probability And Counting Theory
Section9.7: Probability
Problem 1SE: What term is used to express the likelihood of an event occurring? Are there restrictions on its...
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Test the claim that the mean GPA of night students is significantly different than 3.2 at the 0.05 significance level.

The null and alternative hypothesis would be:

 

H0:μ≤3.2H0:μ≤3.2
H1:μ>3.2H1:μ>3.2
H0:p≤0.8H0:p≤0.8
H1:p>0.8H1:p>0.8
H0:p≥0.8H0:p≥0.8
H1:p<0.8H1:p<0.8
H0:μ≥3.2H0:μ≥3.2
H1:μ<3.2H1:μ<3.2
H0:p=0.8H0:p=0.8
H1:p≠0.8H1:p≠0.8
H0:μ=3.2H0:μ=3.2
H1:μ≠3.2H1:μ≠3.2



The test is:

 

right-tailed
two-tailed
left-tailed



Based on a sample of 65 people, the sample mean GPA was 3.16 with a standard deviation of 0.05

The test statistic is:  (to 2 decimals)

The p-value is:  (to 2 decimals)

Based on this we:

  • Fail to reject the null hypothesis
  • Reject the null hypothesis
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