Q6 Using the Consumer Transportation Survey data below, develop 95% and 99% prediction intervals as described in parts a through d.

 

a What is the upper limit for a 95% prediction interval for the hours per week that a an individual will spend in his or her vehicle?

 

b What is the lower limit for a 95% prediction interval for the hours per week that a an individual will spend in his or her vehicle?

 

c What is the upper limit for a 99% prediction interval for the miles driven per week for an individual?

 

d What is the lower limit for a 99% prediction interval for the miles driven per week for an individual?

 

Hours per week in vehicle Miles driven per week

 

10 700

 

12 580

 

15 850

 

5 400

 

3 420

 

5 500

 

5 350

 

15 1400

 

5 250

 

4 400

 

8 400

 

15 800

 

6 285

 

15 1000

 

4 275

 

10 675

 

5 370

 

16 840

 

5 300

 

4 300

 

21 1000

 

5 300

 

10 600

 

2 200

 

6 300

 

10 450

 

10 700

 

5 350

 

10 600

 

5 150

 

10 700

 

5 400

 

3 400

 

10 450

 

10 720

 

5 350

 

5 175

 

8 350

 

30 1500

 

6 355

 

5 350

 

11 600

 

10 800

 

5 175

 

5 350

 

avg 

 

stdev.s