Consider the data set below. xi 3 12 6 20 14 yi 55 40 55 10 15 - The estimated regression equation is y = 30.33 1.88x. Use Table 1 of Appendix B. a. Estimate the standard deviation of y* when x = 8 (to 3 decimals). b. Develop a 95% confidence interval for the expected value of y when x = 8 (to 2 decimals). ( ) c. Estimate the standard deviation of an individual value of y when x = 8 (to 2 decimals). d. Develop a 95% prediction interval for y when x = 8 (to 2 decimals). ) )