HW9_skel

10.1

9.

right tailed 10. left tailed

11.

two tailed 12.

right tailed 13.

left tailed 14.

two tailed 15.

Ho: p = .399

H1: p > .399

17.

Ho: mean = 245,700

H1: mean < 245,700

19.

Ho: st dev = .7

H1: st dev < .7

21.

Ho: mean = 48.79

H1: mean is not equal to 48.79

10.2

7.

1. 2.314
2. .0104
3. reject the null hypothesis

9.

1. -.7385
2. .2320
3. don’t reject null hypothesis

11.

1. -1.49
2. .1362
3. don’t reject the null hypothesis

13.

In 100 samples of 100 companies each, 27 of the times over 50 would win, so we don’t 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. p hat = .4719

Ho: p = .5

H1: p < .5

3. -1.465 and a .0721 probability, we cannot reject the null hypothesis

17.

1. .6455 p value = .2611

2. don’t reject the null hypothesis

19.

1. 2.6836 probability = .0037
2. reject the null hypothesis