A sales manager for an advertising agency believes that ther

A sales manager for an advertising agency believes that there is a relationship between the number of contacts that a sales person makes and the amount of the sales dollars earned. A regression analysis shows the following results: The 98% confidence interval for 16 calls is

Solution

regression equation y = 1.799+2.265X

when X=16; predicted y = 38.039

degrees of freedom = 24-2

t-value at 0..02/2, 24 df =2.508

38.039+-2.508 *SE(Y^)

Answer is (32.95,43.13)