Data Set 5 in Appendix B lists full IQ scores for a random sample of subjects with
Question:
Data Set 5 in Appendix B lists full IQ scores for a random sample of subjects with low lead levels in their blood and another random sample of subjects with high lead levels in their blood. The statistics are summarized below. Use a 0.05 significance level to test the claim that the mean IQ score of people with low lead levels is higher than the mean IQ score of people with high lead levels.
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Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Do the following:
a. Test the given claim using the P-value method or critical value method.
b. Construct a confidence interval suitable for testing the given claim.
Step by Step Answer:
a H 0 1 2 H 1 1 2 Test statistic t 2282 Critical value t 1725 Tech 2004 P value 005 Tech 00132 R...View the full answer
