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In the past, management at the Mall of Elbonia has found that their clientele was about 55% women and 45% men. However, the new director of marketing believes that the ratio might be moving away from that traditional figure to one that is not so skewed towards women. Do the data in the sample represented in the Excel file support his contention at the .05 level of significance?
Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-Value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim.
Suppose you found that in doing the hypothesis test, you were able to reject the null hypothesis. What is the most appropriate conclusion to draw?
Calculate separate confidence intervals for the numbers of days absent for Clinic A and Clinic B, respectively.
Using the probability formulas, find the proportion of employees who either have MBAs or are managers.
Otherwise you lose $1. If you make this wager very many times, what will be the mean outcome?
What is the minimum-cost order quantity for the shoes? What are the annual savings of your inventory policy over the policy currently being used by Keith?
Teenage pregnancies. The U.S. National Center for Health Statistics reports for 2006 the distribution of teenage pregnancies by age range and ethnicity of the mother.
Assume that the following four examines were tested as part of a large group that had a normally curved distribution.
Choose the correct conclusion regarding the claim that the weights of statistics text vary more than the weights of text in general.
Find the probability of accepting a lot as a function of the actual fraction of defective chips. In particular, let the actual fraction of defective chips in a given lot equal any of 0.02, 0.04, 0.06, 0.08, 0.10, 0.12, 0.14, 0.16, 0.18. Then compu..
Develop a probability distribution for the number of travelers who plan their trips within two weeks of departure.
Formulating null and alternative hypothesis to test the claim averaging about $5000.
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