Test the claim that the mean GPA of night students is smaller than the mean GPA of day students at the 0.005 significance level.The null and alternative hypothesis would be:
The test is:
The sample consisted of 70 night students, with a sample mean GPA of 2.16 and a standard deviation of 0.07, and 70 day students, with a sample mean GPA of 2.18 and a standard deviation of 0.06.
The test statistic is: (to 2 decimals)The p-value is: (to 2 decimals)Based on this we:
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