Chapter 13 Homework i Saved 14 Exercise 13-31 (Algo) (LO13-6) 6.25 The following sample observations were randomly selected. (Do not round the intermediate values. Negative amount should be points indicated by a minus sign. Round your answers to 3 decimal places.) X 10 V : eBook a. Determine the 90% confidence interval for the mean predicted when x = 8. Print References b. Determine the 90% prediction interval for an individual predicted when x = 8