Given are five observations for two variables, and y. Use Table 2 of Appendix B. Ti 1 Yi 4 Round your answers to two decimal places. a. Using the following equation: 1 S₁ = 8 + n Σ(x₁ - x)² D Estimate the standard deviation of * when z = 4. b. Using the following expression: ŷ* ±ta/28* Develop a 95% confidence interval for the expected value of y when z = 4. to c. Using the following equation: 1 8pred=8 1+ + 72 Σ(x - 7) Estimate the standard deviation of an individual value of y when z-4. d. Using the following expression: ŷto/2 pred Develop a 95% prediction interval for y when a to 2 7 345 5 11 13

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