10.1

9.

Type answer here. right-tailed μ 10.

Type answer here. left tailed p 11.

Type answer here. two tailed σ 12.

Type answer here. right tailed p 13.

Type answer here. left tailed μ 14.

Type answer here. two tailed σ 15.

Ho: p=0.399

H1: p>0.399 b. concluding that the proportion of students who enroll in Joliet Junior College and earn a bachelor’s degree within six years is greater than 0.399. when, in fact, the proportion of students who enroll in Joliet Junior College and earn a bachelor’s degree within six years is not greater than 0.399.

  1. concluding that the proportion of students who enroll in Joliet Junior College and earn a bachelor’s degree within six years is not greater than 0.399 when, infact, the proportion of students who enroll in Joliet Junior College and earn a bachelor’s degree within six years is greater than 0.399. 17.

Ho: μ= 245,700

H1: μ<245,700 b. concluding that the existing home prices in the broker’s neighborhood are lower than 245,700 when, in fact, the existing home prices in the broker’s neighborhood are not lower than 245,700.

  1. concluding that the existing home prices in the broker’s neighborhood are not lower than 245,700 when, in fact, the existing home prices in the broker’s neighborhood are lower than 245,700.

19.

Ho: σ=0.7

H1: σ<0.7

b.concluding that the pressure variability has been reduced below 0.7 psi when, in fact, the pressure variability has not been reduced below 0.7 psi.

  1. concluding that hte pressure variability has not been reduced below 0.7 psi when, in fact, the pressure variability has been reduced below 0.7 psi. 21.

Ho: μ=48.79

H1: μ≠48.79 b. concluding that the mean monthly revenue per cell phone is not 48.79 when, in factm the mean mnthly revenue per cell phone is 48.79.

  1. concluding that the mean monthly revenue per cell phone is 48.79 when, in factm the mean monthly revenue per cell phone is 48.79.

10.2

7.

  1. Type value of test statisic here. 2.31
  2. Type pvalue here. 0.375
  3. Type decision here. because the test statistic is greater than the critical value, reject the null hypothesis. because the P value is less than the level of significance, reject the null hypothesis.

9.

  1. Type value of test statisic here. -0.74
  2. Type pvalue here. 0.52
  3. Type decision here. because tje test statistic is greater than the critical value, do not reject the null hypothesis, because the P value is greater than the level of significance, do not reject the null hypothesis.

11.

  1. Type value of test statisic here. -1.49
  2. Type pvalue here. 0.88
  3. Type decision here. because the test statistic does not lie in the critical region, do not reject the null hypothesis. because the P calue is greater than the level of siginificance, do not reject the null hypothesis.

13.

Type answer here the P value of 0.2743 means that if the null hypothesis is true, this type of result would be expected in about 27 or 28 out of 100 samples. the observed results are not unusual. because the P value is large, do not 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. Type answer here. 0.472

Ho: p=0.5

H1: p<0.5

  1. it is reasonable to assume that the sample is random.

17.

  1. Type value of (test statisic and critical value) or pvalue here. (you can use either method.) test statistic: 0.65

  2. Type answer here. do not reject the null hypothesis.

19.

  1. Type value of (test statisic and critical value) or pvalue here. (you can use either method.) test statistic: 2.69

  2. Type answer here. reject the null hypothesis.