You are testing the claim that the mean GPA of night students is less than the mean GPA of day students. -Sample 1: You sample 25 night students, and the sample mean GPA is 2.96 with population standard deviation of 0.39 -Sample 2: You sample 60 day students, and the sample mean GPA is 2.89 with population standard deviation of 0.7 Calculate the z-test statistic, please keep at least 6 decimal places during the calculation.

Hint: Use the test statistic formula: z=(x1x2)(12)21n1+22n2z=(x1-x2)-(1-2)12n1+22n2, (Note: 121-2 =