Note: \(\mu\) \(\sigma\)

10.1

9.

right tailed,μ

10.

left tailed, p

11.

two tailed,σ

12.

right tailed, p

13.

left tailed, μ

14.

two tailed, σ

15.

Ho: p=0.105

H1:p>0.105

17.

Ho:u= $218,600

H1: u<$218,600

19.

Ho: O=0.7

H1: 0 <0.7

21.

Ho: u = $47.47

H1: u does not equal $47.47

10.2

7.

  1. 42
  2. classical approach z of 0 =2.31 > z.05 =1.645 reject the null hypothesis
  3. p= .0104 < alpha =.05; reject the null hypothesis. there is sufficient evidence at the alpha .05 level of signicficane to reject the null hypothesis

9.

  1. 37.1
  2. z of 0 -0.74 > -z.10 =-1.28 do not rejct the null hypothesis

  3. p= 0.2296 > alpha =.10 do not reject the null hypothesus there is not sufficient evidence at the alpha =.10level of significance to rejct the null hypothesis 11.

  4. 45
  5. classical approach z of 0 = -1.49 is between -z.025 = -1.96 and z.o25 = 1.96 do reject the null hypothesis

  6. p =.1362 >.05 do not reject the null reject the null hypothesis There is not sufficient evidence at the alpha =.05 level of significance to reject the null hypothesis. 13.

27 in 100 samples will give a samples will give a sample proportion as high or higher than the one obtained if the population propotion really is .5. because this probability is not small we do not reject the null hypothesis. there is not sufficien evidence to conclude that the dart picking strategy resulted in a majority if winners.

15.

  1. z=0.646, P(z>0.646)=0.2578, 0.2578>0.01 z0.01=2.325, 0.646<2.325

  2. There is not sufficient evidence at the alpha=0.01 level of significance to conclude that more than 1.9% of Liptor users experience flulie symptoms as a side effect.

17.

a)z=1.092, z0.05=1.645, 1.092<1.645 p=0.1379, 0.1379>0.05

  1. There is not sufficient evidence at the alpha=0.05 level of significance to conclude that a majority of adults in the United States believe they will not have enough money in retirement.

19.

  1. z=2.604, z0.05=1.645, 2.604>1.645 p=0.0047, 0.0047<0.05
  2. There is sufficient evidence at the alpha=0.05 level of significance to support the claim that the proportion of employed adults who feel basic mathematical skills are critical or very important to their job is greater than 0.56.