The following data were used in a regression study.

observation xi yi

1 2 4

2 3 5

3 4 4

4 5 6

5 7 4

6 7 6

7 7 9

8 8 5

9 9 11

a. develope an estimated regression equation for these data.

b. construct a plot of the residuals. do the assumptions about the error term seem to be satisfied?

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes