The 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 were collected. The statistics are summarized in the accompanying table. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are équal. Complete parts (a) to (c) below. Low Lead Level H1 High Lead Level 2 95 91.26016 15.79292 27 86.11758 8.87896 scores. b. Construct a confidence interval appropriate for the hypothesis test in part (a). (Bou needed 1

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