TRY IT YOURSELF ANSWERS A43 Section 10.3 1. 2.45 2. 18.31 3. There is enough evidence at the 1% level of significance to support the researcher’s claim that a specially treated intravenous solution decreases the variance of the time required for nutrients to enter the bloodstream. 4. There is not enough evidence at the 1% level of significance to reject the biologist’s claim that the pH levels of the soil in the two geographic locations have equal standard deviations. Section 10.4 1. There is enough evidence at the 5% level of significance for the analyst to conclude that there is a difference in the mean monthly sales among the sales regions. 2. There is not enough evidence at the 5% level of significance to conclude that there is a difference in the means of the GPAs. Appendix A 1. (1) 0.4857 (2) z = ±2.17 2. 0.9834 3. 0.9846 4. 0.0733 Appendix C 1. 42,000 −3 8000 3 Because the points do not appear to be approximately linear and there is an outlier, you can conclude that the sample data do not come from a population that has a normal distribution.
RkJQdWJsaXNoZXIy NjM5ODQ=