HW9_skel

10.1

9.

Right tailed, mu

10.

Left tailed, p

11.

Two tailed, sigma

12.

Right tailed, p

13.

Left tailed, mu

14.

Two tailed, sigma

15.

Ho: p = 0.399

H1: p > 0.399

17.

Ho: mu = 245,700 dollars

H1: mu < 245,700 dollars

19.

Ho: sigma = 0.7 psi

H1: sigma < 0.7 psi

21.

Ho: mu = 48.79 dollars

H1: mu /= 48.79 dollars

10.2

7.

1. 2.31
2. 0.0104
3. Reject the null hypothesis because 0.0104<0.05.

9.

1. -0.74
2. 0.2296
3. Do not reject null hypothesis because 0.2296>0.1.

11.

1. -1.49
2. 0.1362
3. Do not reject null hypothesis because 0.0681>0.05.

13.

Since the p value is larger than the level of significance we fail to reject the null hypothesis.

15. Note this is slightly modified version of the book problem Just answer a) b) and c) fromt the skeleton.

1. 0.472

Ho: p = 0.5

H1: p < 0.5

3. -1.45, Because 0.0735 > 0.5 we do not reject the null hypothesis.

17.

1. p value = 0.2582

2. Do not reject the null hypothesis.

19.

1. p value = 0.0036

2. Since 0.0036 < 0.05 we reject the null hypothesis.