Test the claim that the mean GPA of night students is smaller than 2.5 at the .05 significance level. The null and alternative hypothesis would be: H0:μ=2.5H0:μ=2.5 H1:μ≠2.5H1:μ≠2.5 H0:p=0.625H0:p=0.625 H1:p≠0.625H1:p≠0.625 H0:p=0.625H0:p=0.625 H1:p>0.625H1:p>0.625 H0:p=0.625H0:p=0.625 H1:p<0.625H1:p<0.625 H0:μ=2.5H0:μ=2.5 H1:μ>2.5H1:μ>2.5 H0:μ=2.5H0:μ=2.5 H1:μ<2.5H1:μ<2.5 The test is: right-tailed two-tailed left-tailed Based on a sample of 35 people, the sample mean GPA was 2.46 with a standard deviation of 0.03 The test statistic is:  (to 2 decimals) The critical value is:  (to 2 decimals) Based on this we: Fail to reject the null hypothesis Reject the null hypothesis

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.