What is the test statistic? The P-Value is? What is the conclusion for the test? Construct a confidence interval for the hypothesis test in part (a). Does exposure to lead appear to have an affect on IQ scores?

lei v this View an example Get more help .__ 72' 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 simpie random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Complete parts '3)'''be'"- ._ . n _nIl- 8888-88 a. Use a 0.01 signicance level to test the claim that the mean to score of people tvh low blood lead levels is higher than the mean it) score of people with high blood lead levels. a What are the null and alternative hypotheses? Assume that population 1 consists of subjects with low lead levels and population 2 consists of subjects with high lead levels. r l OA- Helllg OB. H02p1=p2 H1:P1>"2 H11p1>p2 0c. H01111S|12 ' on. Ho:p1=u2