Listed in the data table are IQ scores for a random sample of subjects with medium lead levels in their blood. Also listed are statistics from a study done of IQ scores for a random sample of subjects with high lead levels. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Click the icon to view the data table of IQ scores X IQ scores a. Use a 0.0 gher than the mean for subjects with high lead levels. What are the Is and population 2 consists of subjects with high lead levels. Medium Lead Level High Lead Level O A. Ho 72 82 n2 = 11 OB. Ho: H1 = H2 92 *2 = 88.199 H1:141 7 12 85 O C. Ho 88 OD. HO: My SH2 97 52 = 9.931 Hy : 1 1 > H2 83 92 98 111 91