Consider the data set below. Use Table 2 of Appendix B. Excel File: data1433.xlsx 3: 3 12 6 20 14 9'" 55 40 55 10 15 a. Estimate the standard deviation of' when a = 8 (to 4 decimals). b. Develop a 95% condence interval for the expected value ofy when E = 8 (to 2 decimals). (I I.l I) c.Estimate the standard deviation of an individual value ofy when a: = S (to 4 decimals). (1. Develop a 95% prediction interval fory when so = 8 (to 2 decimals}. (I M I)