For Exercises 8 through 19, assume that all variables are
Chapter 12, Problem 16(choose chapter or problem)
For Exercises 8 through 19, assume that all variables are normally distributed, that the samples are independent, and that the population variances are equal. Also, for each exercise, perform the following steps. a. State the hypotheses and identify the claim. b. Find the critical value. c. Compute the test value. d. Make the decision. e. Summarize the results, and explain where the differences in the means are. Use the traditional method of hypothesis testing unless otherwise specified.Annual Child Care Costs Annual child care costs for infants are considerably higher than for older children.At a 0.05, can you conclude a difference in mean infant day care costs for different regions of the United States? (Annual costs per infant are given in dollars.) (The information in this exercise will be used in Exercise 6 of Section 122.) New England Midwest Southwest 10,390 9,449 7,644 7,592 6,985 9,691 8,755 6,677 5,996 9,464 5,400 5,386 7,328 8,372
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