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Exam 9: Hypothesis Testing

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Question 51

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(A)At the 0.05 level of significance,is there evidence of a significant difference in average sales among the various aisle locations? (B)If appropriate,which aisle locations appear to differ significantly in average sales? (Use = 0.05) (C)What should the retailing manager conclude? Fully describe the retailing manager's options with respect to aisle locations?

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(A) To test at the 0.05 level of signif...

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Question 52

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The Lilliefors test is used to test for normality.

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Question 53

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(A)Can the sample size be determined from the information above? Yes or no? If yes,what is the sample size in this case? (B)The firm believes that the mean life is actually greater than 1500 hours,should you conduct a one-tailed or a two-tailed hypothesis test? Explain your answer,and state the appropriate null and alternative hypotheses. (C)What is the sample mean of this data? If you use a 5% significance level,would you conclude that the mean life of the light bulbs is typically more than 1500 hours? Explain your answer. (D)If you were to use a 1% significance level in this case,would you conclude that the mean life of the light bulbs is typically more than 1500 hours? Explain your answer.

If the p-value is sufficiently small for an ANOVA test,we can that all the population means are equal.

Side-by-side box-plots are typically a good way to begin the analysis when comparing two populations.