Question

3.28. Adam is studying the relationship between hours of sleep and students GPA's. He passes a survey amongst his 17 students and the data he gathered is as follows

GPA avg	Hours of sleep per night
3.87	5
2.50	8
2.98	10
3.37	6
3.1	5
3.1	4
3.9	7
3.5	8
2.1	5
3.97	6
3.6	10
3.45	6
2.1	5
0.0	9
3.2	11
3.18	6
3.87	4

A.) Find the frequency distribution(S)

B.) Descriptive statistics (mean, medium, mode, range and standard deviation)

C.) Choose between t-Test and Z-Test

Answer 1

A) for GPA data we get

and for sleep hours

B)for gpa

and for hours

C)

here use t test for getting relationship because s.d. of population is unknown

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