1	80
3	97
4	92
4	102
6	103
8	111
10	119
10	123
11	117
13	136

The data ony= annual sales ($1,000s) for new customer accounts andx= numberof years of experience for a sample of 10 salespersons provided the estimated regression equation

= 80 + 4x.

For these data,

x= 7,

(x_ix)²= 142,

and

s= 4.6098.

(a)Develop a 95% confidence interval for the mean annual sales (in thousands of dollars) for all salespersons withtwoyears of experience. (Round your answers to two decimal places.)

$ thousand to $ thousand

(b)The company is considering hiring Tom Smart, a salesperson withtwoyears of experience. Develop a 95% prediction interval of annual sales (in thousands of dollars) for Tom Smart. (Round your answers to two decimal places.)

$ thousand to $ thousand