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wrote...
Posts: 187
3 weeks ago
Studying for exams A philosophy professor has found a correlation of 0.80 between the number of hours students study for his exams and their exam performance. During the time he collected the data, students studied an average of 10 hours with a standard deviation of 2.5 hours, and scored an average of 80 points with a standard deviation of 7.5 points.

a. Create a linear model to estimate the number of points a student will score on the next exam from the number of hours the student studies.
b. If a student studies for 15 hours, what score should the student expect on the next exam? Show your work.
Textbook 

Stats: Modeling the World


Edition: 4th
Authors:
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wrote...
Posts: 262
3 weeks ago
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a. Explanatory variable: number of hours spent studying
    Response variable: score on exam
    slope: 2.40
    intercept: 56
    Model: = 56 + 2.4(Hours)
b. = 56 + 2.4(15) = 92   A student who studies for 15 hours should expect to score 92 points on the exam, based on this model.
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wrote...
3 weeks ago
Thanks
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