Test the claim that the mean GPA of night students is significantly different than the mean GPA of day students at the 0.02 significance level. Part A: What is the null and alternative hypothesis? Part B: Is the test two-tailed, left-tailed, or right-tailed? Part C : the sample consisted of 30 night students, with a sample mean gpa of 2.55 and a standard deviation of 0.06, and 20 day students, with a sample mean gpa of 2.56 and a standard deviation of 0.04. What is the test statistic and p-value? Part D: Based on this do we reject or fail to reject the null hypothesis?