The sample consisted of 25 night students, with a sample mean GPA of 3.01 and a standard deviation of 0.05, and 50 day students, with a sample mean GPA of 2.99 and a standard deviation of 0.06. The test statistic is: (to 2 decimals) For df, use the conservative approximation, the smaller of (n,-1) or (nz-1). The p-value is: ( to 2 decimals )