You may need to use the appropriateappendix tableortechnologyto answer this question.

Given are five observations for two variables,xandy. (Round your answers to two decimal places.)

x_i 1 2 3 4 5

y_i 3 8 4 11 13

(a)

Uses_*=s

1

n

+(x*x)²

(x_ix)²

to estimate the standard deviation of*

whenx=5.

(b)

Use*t_/2s_*

to develop a 95% confidence interval for the expected value ofywhenx=5.

to

(c)

Uses_pred=s

1 +1

n

+(x*x)²

(x_ix)²

to estimate the standard deviation of an individual value ofywhenx=5.

(d)

Use*t_/2s_pred

to develop a 95% prediction interval forywhenx=5.

to