3.26 daily activity. it appears that people who are mildly obese are less active than leaner people. one study looked at the average number of minutes per day that people spend standing or walking.10 among mildly obese people, minutes of activity varied according to the n(373, 67) distribution. minutes of activity for lean people had the n(526, 107) distribution, within what limits do the active minutes for about 95% of the people in each group fall? use the 68-95-99.7 rule.

Aconcession manager at yankee stadium wants to know how temperature affects beer sales. she took a sample of 10 games and recorded the number of beers sold and the temperature in the middle of the game. temperature 80 68 78 79 87 74 86 92 77 84 number of beers 20533 1439 13829 21286 30985 17187 30240 87596 9610 28742 a. draw a scatter plot of the data. b. the manager estimates the regression equation to be: numberofbeers = −100, 678 + 1, 513 ∗ temperature draw this on your scatter plot. c. for one of the estimated points, indicate the residual with ei . d. for that same point, indicate what part of the variation is explained by the model with ˆyi − y¯.