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Quiz5Solns

Quiz5Solns - Statistics and Probability(Math 80 r\s71:8 s...

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- Statistics and Probability (Math 80) r\s71; : 8s; . . . C ..,A J . ' Quiz #5 (Chapters 7 and 8) 1. On the axes below, sketch a scatterplot describing.. . a. a strong negative b. a strong association, association but r is near 0 7 , J" c. a weak but positive positive association . . ' I;L - - - --- < " - r . - b j . \$ 8 F 2. A school board study found a moderately strong negative association between the number - of hours high school seniors worked at part-time jobs after school hours and the students' grade point averages. a. Explain in this context what "negative association" means b. Hoping to improve student performance, the school board passed a resolution urging parents to limit

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