4) As we know, when testing claims about a mean, we can use the critical value method, P-value method, or confidence interval method. If we would like perform a two-tailed hypothesis test at significance level of 0.05. What confidence level of confidence interval should be constructed if we want to apply the confidence interval method? Why?

Interpreting P-value, When the clinical trial of the XSORT method of gender selection is completed, a formal hypothesis test will be conducted with the alternative hypothesis of p > 0.5, which corresponds to the claim that the XSORT method increases the likelihood of having a girl, so that the proportion of girls is greater than 0.5. If you are responsible for developing the XSORT method and you want to show its effectiveness, which of the following P-vales would you prefer: .0999, 0.5, 0.95, 0.05, 0.01., 0.001? Why?

a.Express the original claim in symbolic form.

b. Identify the null and alternative hypothesis.

6. Claim: When parents use the XSORT method of gender selection, the proportion of baby girls is greater than 0.5. The latest actual results show that among 945 babies born to couples using the XSORT method of gender selection, 879 were girls.

8. Claim: The standard deviation of pulse rates of adult women is at least 50. For the random sample of adult females in Data Set 1 from Appendix B, the pulse rates have a standard deviation of 11.6.

Subject | Mathematics |

Due By (Pacific Time) | 11/27/2014 12:00 am |

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