Statistics: Test Student GPA va hours of sleep at night

See attached files.

JUST NEED 2,3 AND 4 DONE .

Assignment:

1. Chapter 12: 12.3
PLUS, compare to the results obtained by doing each X separately. Discuss.

2. The following data represent the number of hours of sleep that engineering students got
per night and GPA. Is there a relationship between the two? You may use Excel for
this. Comment on the underlying assumptions.

Gender Sleep/night GPA
Male 6 3.667
Female 6.5 3.85
Male 6 3.4
Male 6.5 3
Female 8 2
Male 7.5 1.9
Female 7 2.3
Male 7 3.2
Male 6 2.95
Male 4 2.8
Male 7 3
Male 8 2.461
Female 4 3.45
Male 6 3.86
Female 6 3.4
Male 7 3
Female 7 3.61
Male 5 3.21
Male 6 3.5
Male 4.5 3.21
Male 5 3.527
Male 7 2.5
Male 7 3.5
Male 6.5 3.884
Female 5 3.26
Male 6 3.54
Male 6 3
Male 7.5 3.586
Male 7.5 3.69
Male 5 3.6
Male 7 1.78
Male 5 2.985
Male 7 2.8
Male 6 4
Female 6.5 2.4
Male 6 4
Male 8 4
Male 8 3.67
Female 7 3
Female 5 3.5
Male 4.5 3.56
Male 6 3.6
Male 6 3.08
Male 7 3.6
Male 6 3.65
Male 5 4
Male 6 3.26
Female 7 3.94
Male 7 3.3
Male 5.5 3.7
Male 5 3.2
Male 8 3.5
Male 7 3.01
Male 7 3.86
Female 7 3.73
Male 6 3.93
Male 6 4
Male 7 3.111
Male 7 3.7
Female 8 3.87
Male 4 3.764
Male 4.5 3.5
Male 5 2.8
Male 5 3.9
Female 5 2.66
Female 5 3
Female 5 4
Male 5 2.8
Male 5 3.4
Female 5 4
Male 5 3.77
Male 6 3.1
Female 6 3.4
Male 6 3.8
Male 6 4
Male 6 3
Male 6 3.64
Female 6 4
Male 6 3.9
Male 6 3.7
Male 6 3.6
Female 6 2.5
Male 6 2
Male 6 3.9
Male 6 4
Female 6 3.6
Male 6 2.7
Female 6 2.882
Male 6.5 3.47
Male 7 3.95
Male 7 3.32
Female 7 3.4
Female 7 3.85
Male 7 3.2
Male 7 2.4
Male 7 3
Male 7 3.48
Male 7 2.9
Male 7 3.3
Female 7 4
Male 7 3.45
Female 7 3.3
Male 7 3.41
Male 7 3.6
Female 7 2.64
Female 7 3.8
Female 7 3.53
Male 7 3.8
Male 7 3.75
Female 7.5 3.7
Female 8 4
Male 8 2.87
Female 8 3.55
Male 8 3.24
Female 8 3.939
Male 8 3.47
Male 8 3.8
Male 8 4
Male 8 3.27
Male 8 3.7

3. Using the same data as in the previous problem, is there a difference in the number of
hours of sleep gotten by men and women? Don't forget data plots.

4. Using the same data, is there a difference in the GPAs of male and female students,
based on these data? Don't forget data plots.

5. The number of defects on printed circuit boards is counted, giving these data. Do they
follow a Poisson distribution?

# Defects Frequency
0 32
1 15
2 9
3 4