An article in Growth: A Journal Devoted to of Normal and Abnormal Growth [Comparison of

Chapter 9, Problem 9-57

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An article in Growth: A Journal Devoted to of Normal and Abnormal Growth [Comparison of Measured and Estimated Fat-Free Weight, Fat, Potassium and Nitrogen of Growing Guinea Pigs (Vol. 46, No. 4, 1982, pp. 306321)] reported the results of a study that measured the body weight (in grams) for guinea pigs at birth. 421.0 452.6 456.1 494.6 373.8 90.5 110.7 96.4 81.7 102.4 241.0 296.0 317.0 290.9 256.5 447.8 687.6 705.7 879.0 88.8 296.0 273.0 268.0 227.5 279.3 258.5 296.0 (a) Test the hypothesis that mean body weight is 300 grams. Use 0.05. (b) What is the smallest level of significance at which you would be willing to reject the null hypothesis? (c) Explain how you could answer the question in part (a) with a two-sided confidence interval on mean body weight.

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