1Q and Lead Exposure. The data set IQLEAD (found in the lab description) lists full IQ scores for a random sample of subjects selected from a group with low lead levels in their blood and another random sample of subjects selected from a group with high lead levels in their blood. The statistics are for these groups 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. Low Lead Level: n = 78, x= 92.88462, s = 15.34451 High Lead Level: n = 21, x = 86.90476, s = 8.988352 Are the samples in this case independent meaning we should use a 2-sample Independent T-Test or are they dependent samples meaning we should use a Matched Pairs Design? Independent so 2-Sample Independent Design Dependent so a Matched Pairs Design