For Exercises 5 through 17, perform each of the following steps. a. State the hypotheses
Chapter 9, Problem 8(choose chapter or problem)
For Exercises 5 through 17, perform each of the following steps. a. State the hypotheses and identify the claim. b. Find the critical value(s). c. Compute the test value. d. Make the decision. e. Summarize the results. Use the traditional method of hypothesis testing unless otherwise specified.Heights of 9-Year-Olds At age 9 the average weight (21.3 kg) and the average height (124.5 cm) for both boys and girls are exactly the same. A random sample of 9-year-olds yielded these results. Estimate the mean difference in height between boys and girls with 95% confidence. Does your interval support the given claim? Boys Girls Sample size 60 50 Mean height, cm 123.5 126.2 Population variance 98 120
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