Question

Given are five observations for two variables, x and y. x i 1 2 3 4 5 y i 3 8 6 12 13 Round your answers to two decimal places. a. Using the following equation: Estimate the standard deviation of ŷ* when x = 3. b. Using the following expression: Develop a 95% confidence interval for the expected value of y when x = 3. to c. Using the following equation: Estimate the standard deviation of an individual value of y when x = 3. d. Using the following expression: Develop a 95% prediction interval for y when x = 3. If your answer is negative, enter minus (-) sign. to

Answer 1

a)

std deviation=0.88

b)95% CI =5.60 ; 11.20

c)

std deviation=2.15

d)

95% PI=1.55 ; 15.25 (try 1.56 ; 15.24 if this comes wrong)(