Please help me solve this 1 The data below gives the GPAs o

(1) The data below gives the GPAs of ten randomly chosen engineering students at a certain university: Use Minitab to give 95, 98 and 99% C.Ls for the mean GPA of engineers at this university, assuming normal populations. Give the estimated margin of error in each case. Hand in Minitab printouts of both worksheets.

Solution

First let us find mean and std deviation for the sample given.

Mean = 3.181

Std dev = 0.3563

Std error = 0.3563/rt10 = 0.1126

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stderror	0.1126	0.1126	0.1126
Conf level	95	98	99
Z alpha/2	1.96	2.33	2.58
Margin of error	0.220696	0.262358	0.290508
Mean	3.181	3.181	3.181
Conf interval lower bound	2.960304	2.918642	2.890492
Upper bound	3.401696	3.443358	3.471508