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

H1: mu < $245,700

19.

Ho: sigma = 0.7psi

H1: sigma < 0.7psi

21.

Ho: mu = $48.79

H1: mu is not = to $48.79

10.2

7.

  1. np0(1-p0)=42>10
  2. p = 0.0104
  3. reject null hypothesis

9.

  1. np0(1-p0)=37.1>10
  2. p=0.0004
  3. do not reject null hypothesis

11.

  1. np0(1-p0)=45>10
  2. 0.1362
  3. do not reject null hypothesis

13.

Do not reject the null hypothesis. The probabiltiy of this occuring is not small and therefore there is not enough significant information to say that the strategy for dart picking resulted in a majority of winners.

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

  1. p hat= 0.47

Ho: 0.5

H1: p < 0.5

  1. np0(1-p0)=169.5>10, do not reject the null hypothesis

17.

  1. np0(1-p0)=16.1>10

  2. do ot reject null hypothesis

19.

  1. np0(1-p0)=24.19>10, p=0.0036

  2. do not reject the null hypothesis