10.3

1.

  1. Type answer here. 2.602
  2. Type answer here. -1.729
  3. Type answer here. +_2.179

2.

  1. Type answer here. 1.321
  2. Type answer here. -2.426
  3. Type answer here. +_2.738

3.

  1. Type answer here. -1.379
  2. Type answer here. -1.714

  3. skip

  4. Type answer here. the researcher will not reject the null hypothesis because the test statistic is not in the critical region. 4.

  5. Type answer here. 2.67
  6. Type answer here. 1.318

  7. skip

  8. Type answer here. the researcher will reject the null hypothesis 5.

  9. Type answer here. 2.502
  10. Type answer here. -2.819 and 2.819

  11. skip

  12. Type answer here. the resarcher wil not reject the null hypothesis because the test statistic is not in the critical region.

  13. Type answer here. using technology, the 99% confidence interval is (99.393,110.207)

11.

Ho: μ=22

H1: μ>22

  1. Type answer here. it is given that the sample is random. the sample size, 200, is at least 30. it is reasonable to assume the sampled values are independent.

  2. Type answer here. 2.176 the P value is 0.0154. since 0.0154<0.05 reject the null hypothesis. 13.

Ho: μ=22

H1: μ>22

  1. it is given that the sample is random. the samole size, 200, is at least 30. it is reasonable to assume the sampled values are independent.

  2. 2.176. the P value is 0.0154. Since 0.0154<0.05, reject the null hypothesis.

  3. there is sufficient evidence to conclude that students who complete the core curriculum are ready for college-level mathematics.

15.

State your pvalue or test statisic value and conclusion. test statistic: -4.553 reject the null hypothesis 17.

State your pvalue or test statisic value and conclusion. p value: 0.2106 do not rejec the null hypothesis.

19.

Report your confidence interval and conclusion here. the 95% confidence interval is (35.439,42.361) the interval contains 40.7, which implies that the mean age of a death-row inmate has not changed from 2002.

10.4

1.

  1. Type answer here. 28.869
  2. Type answer here. 14.041
  3. Type answer here. 16.047, 45.722

3.

  1. Type answer here. 20.496
  2. Type answer here. 13.091

  3. Skip but feel free to sketch on a piece of paper for your benefit.

  4. Type answer here. the researcher will not reject the null hypothesis because the test statistic is not in the critical region 13. Feel free to use any method you want. If you use the classical method please report the value of your test statistic and your decision. Likewise if you use the pvalue method please state your pvalue and your decision. Hint: The sample standard deviation (s) is 15.20.

6.418 this test statistic follows a 9 degrees of freedom.

15. Feel free to use any method you want. If you use the classical method please report the value of the test statistic and your decision. Likewise if you use the pvalue method please state your pvalue and your decision. 15.639 this test statistic follows a 24 degrees of freedom.