(Round all intermediate calculations to at least 4 decimal places.) Numerous stu
ID: 3061801 • Letter: #
Question
(Round all intermediate calculations to at least 4 decimal places.) Numerous studies have shown that watching too much television hurts school grades. Others have argued that television is not necessarily a bad thing for children (Mail Online, July 18, 2009). Like books and stories, television not only entertains, it also exposes a child to new information about the world. While watching too much TV is harmful, a little bit may actually help. Researcher Matt Castle gathers information on the grade point average (GPA) of 28 middle school children and the number of hours of TV they watched per week. A portion of the data is shown in the accompanying table GPA 3.24 3.10 3.24 2.61 3.03 3.37 1.60 3.20 2.96 2.18 2.50 2.95 2.72 3.05 3.45 2.49 3.62 2.33 2.36 3.28 3.35 2.64 2.88 2.02 2.60 3.18 3.31 Hours TV 21 18 30 23 10 36 13 31 04. 25 21 08 27 29 30 15 24 29 21 04. Click here for the Excel Data FileExplanation / Answer
a) GPA-hat = 3.0945 + 0.041 Hours - 0.002191 Hours^2
b) Correct answer: Option (D)
c) Correct answer: 3.0945
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