HW3_skeleton

3.1

13. Mean: 30.517; Median: 31.3; Mode: n/a

14. Mean: 93.1; Median: 87.9; Mode: n/a

15. Mean: 3670 psi; Median: 3830 psi; Mode: 4090 psi

16. Mean: 266; Median: 266; Mode: 260

17

1. less than

2. approx. equal

3. greater than

3.2

5. sample st dev= 6; sample variance= 36

6. sample st dev= 10; sample variance= 100

7. population st dev: 36.222; population variance: 1,312

8. population st dev= 6.95; population variance= 48.23

9. sample st dev= 14; sample variance= 196

10. populatin st dev= 5; population variance= 25

11. Range: 25; Sample St Dev= 5.86

24

1. 6 seconds

2. In referring to the histogram of Sec 3.1 #26, it is appropriate to use the empirical rule because it is a bell curve.

3. 95%

4. ~93.8%

5. 26%

6. 10.2%