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    Statistics: Test Student GPA va hours of sleep at night

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    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

    © BrainMass Inc. brainmass.com October 10, 2019, 2:48 am ad1c9bdddf
    https://brainmass.com/statistics/analysis-of-variance/statistics-test-student-gpa-versus-hours-sleep-night-394746

    Attachments

    Solution Preview

    THE HIGH P VALUES AND LOW R SQUARED VALUES SHOW THERE IS NOT A RELATIONSHIP BETWEEN SLEEP AND GPA.

    The regression equation is
    C2 = 6.68 - 0.076 C3

    Predictor Coef SE Coef T P
    Constant 6.6820 0.6438 10.38 0.000
    C3 -0.0765 0.1885 -0.41 0.686

    S = 1.04483 R-Sq = 0.1% R-Sq(adj) = 0.0%

    Analysis of Variance

    Source DF SS MS F P
    Regression 1 0.180 0.180 0.16 0.686
    Residual Error 116 126.634 1.092
    Total 117 126.814

    Unusual Observations

    Obs ...

    Solution Summary

    The expert tests a student GPA versus the hours of sleep at night.

    $2.19