Chapter 14.6, Problem 32E

The data from exercise 1 follow.

xi	1	2	3	4	5
yi	3	7	5	11	14

1. a. Use equation (14.23) to estimate the standard deviation of ŷ* when x = 4.
2. b. Use expression (14.24) to develop a 95% confidence interval for the expected value of y when x = 4.
3. c. Use equation (14.26) to estimate the standard deviation of an individual value of y when x = 4.
4. d. Use expression (14.27) to develop a 95% prediction interval for y when x = 4.