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Birth Weights A simple random sample of 81 births of
Chapter 8, Problem 5RE(choose chapter or problem)
Problem 5RE
Birth Weights A simple random sample of 81 births of Chinese babies resulted in a mean birth weight of 3245 g and a standard deviation of 466 g. Test the claim that the standard deviation of birth weights of Chinese babies is equal to 567 g, which is the standard deviation of birth weights of Caucasian babies. Use a 0.01 significance level and assume that the birth weights are normally distributed.
Questions & Answers
QUESTION:
Problem 5RE
Birth Weights A simple random sample of 81 births of Chinese babies resulted in a mean birth weight of 3245 g and a standard deviation of 466 g. Test the claim that the standard deviation of birth weights of Chinese babies is equal to 567 g, which is the standard deviation of birth weights of Caucasian babies. Use a 0.01 significance level and assume that the birth weights are normally distributed.
ANSWER:
Solution 5RE
Since this is two tailed test, with degrees of freedom, , the critical values of
