Full answer: Hypothesis Tests of Claims About Variation. In Exercises 716, test the
Chapter 9, Problem 13(choose chapter or problem)
Hypothesis Tests of Claims About Variation. In Exercises 716, test the given claim. Assume that both samples are independent simple random samples from populations having normal distributionsRadiation in Baby Teeth Listed below are amounts of strontium90 (in millibecquerels, or mBq, per gram of calcium) in a simple random sample ofbaby teeth obtained from Pennsylvania residents and New York residents born after 1979 (based on data from An Unexpected Rise in Strontium90 inU.S. Deciduous Teeth in the 1990s, by Mangano, et al., Science of the Total Environment, Vol. 317). Use a 0.05 significance level to test the claim thatamounts of strontium90 from Pennsylvania residents vary more than amounts from New York residents.Pennsylvania: 155 142 149 130 151 163 151 142 156 133 138 161New York: 133 140 142 131 134 129 128 140 140 140 137 143
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