Repeat Exercise 16 after replacing the low lead level group with the following full IQ scores from
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Repeat Exercise 16 after replacing the low lead level group with the following full IQ scores from the medium lead level group.
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.
Transcribed Image Text:
72 90 92 71 86 79 83 114 100 93 91 98 91 46 85 82 97 91 92 77 111 78
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