Repeat Exercise 12 IQ and Lead by assuming that the two population standard deviations are equal, so
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Repeat Exercise 12 “IQ and Lead” by assuming that the two population standard deviations are equal, so σ1 = σ2. Use the appropriate method from Part 2 of this section. Does pooling the standard deviations yield results showing greater significance?
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a H 0 1 2 H 1 1 2 population 1 low lead population 2 high lead Test statistic t 170...View the full answer
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Related Book For 
Mathematical Interest Theory
ISBN: 9781470465681
3rd Edition
Authors: Leslie Jane, James Daniel, Federer Vaaler
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