Xi Yi (c) Use s, 1 2 3 4 (a) Use S* = SV S* 1 n X 7 + X 5 4 5 (b) Use * ta/25* to develop a 95% confidence interval for the expected value of y when x = 5. X to X pred = SV n 10 14 (x*- x) to estimate the standard deviation of * when x = 5. 2 (x, x)

(a) Use sp=sn1+(x1x)2(xx)2 to estimate the standard deviation of when x=5. (b) Use ^tw/25 to develop a 95% confidence interval for the expected value of y when x=5. x to (c) Use spred=51+n1+(xix)2(xx)2 to estimate the standard deviation of an individual value of y when x=5. (d) Use y^t/25 pred to develop a 95% prediction interval for y when x=5