Listed below are amounts of strontium-90 (in millibecquerels, or mBq, per gram of calcium) in a simple
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Listed below are amounts of strontium-90 (in millibecquerels, or mBq, per gram of calcium) in a simple random sample of baby teeth obtained from Pennsylvania residents and New York residents born after 1979. Use a 0.05 significance level to test the claim that amounts of strontium-90 from Pennsylvania residents vary more than amounts from New York residents.
Assume that both samples are independent simple random samples from populations having normal distributions.
Transcribed Image Text:
Pennsylvania 155 142 149 130 151 163 15 142 156 133 138 161 New York: 133 140 142 13 34 129 128 140 140 140 137 143
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