Question
A psychologist collected data on a person's age and the number of hours per week that person spent on the internet. The data are shown
A psychologist collected data on a person's age and the number of hours per week that person spent on the internet. The data are shown in the following table.
Age (years) | 74 | 67 | 62 | 56 | 50 | 46 | 38 | 31 | 25 | 22 | 15 |
---|---|---|---|---|---|---|---|---|---|---|---|
Time (hours) | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 |
(a)Find the equation of a linear regression line for the data where age is the independent variable,x, and time is the dependent variable. (Round your numerical answers to three decimal places.)=
(b)Using the equation from part (a), estimate the number of hours a person 30 years old spends on the internet. (Round your answer to the nearest hour.) hr(c)Find the linear correlation coefficient. (Round your answer to the nearest four decimal places.)r=
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