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categoryإحصاء schoolبكالوريوس event_available2026-07-15

السؤال

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A union of restaurant and foodservice workers would like to estimate this year's mean hourly wage, μ, of foodservice workers in the U.S. Last year's mean hourly wage was $8.16, and there is reason to believe that this year's value is greater than last year's. The union decides to do a statistical test to see if the value has indeed increased. The union chooses a random sample of this year's wages, computes the mean of the sample to be $8.46, and computes the standard deviation of the sample to be $1.25. Based on this information, answer the questions below. What are the null hypothesis (H) and the alternative hypothesis (H) that should be used for the test? His? His? ▼ ? ? In the context of this test, what is a Type II error? A Type II error is ? in fact, u is? μ the hypothesis that H is ? ? ? when, Suppose that the union decides to reject the null hypothesis. What sort of error might it be making? ?

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