Caucasian 8.27 Caucasian 8.2 Caucasian 8.25 Caucasian 8.14 Caucasian 8.14 Caucasian 9 Caucasian 8.1 Caucasian 7.2 Caucasian 8.32 Caucasian 7.7 Black 7.4 Black 8.8 Black 8.26 Black 8.03 Black 8.49 Black 8.16 Black 8.41 Black 7.89 NativeAM 8.5 NativeAM 9.48 NativeAM 8.65 NativeAM 8.16 NativeAM 8.83 NativeAM 7.76 NativeAM 8.63 NativeAM 9.02 Asian 7.61 Asian 7.88 Asian 8.04 Asian 8.11 Asian 8.27 Asian 7.93

2) The file MSCE is a tab delimited file on genetic data that compare races with respect to MSCE (mean sister chromatid exchange). There are four races in the file: Caucasian, Black, NativeAm and Asian. We are only interested in Caucasian and NativeAm. a) Open the tab delimited file using the infile command and DLM = ' 09X. Be sure to put the 09 in quotes. In this same data step, subset the data to only include Caucasian and NativeAm as the races of interest. b) Write SAS codes to perform a t-test using Proc Ttest. (a)Write the null and alternative hypothesis in words. (b) Indicate whether you should use the pooled or unspooled variance and why. (c) State the value of test statistic. (d) State your p-value and conclusion at =0.05. (e) State the 95% Confidence Interval and interpret it (explain what it tells us). c) Write SAS codes to perform a Wilcoxon Sum Rank test. (a) Write the null and alternative hypothesis in words. (b) State the value of test statistic. (c) State your p-value and conclusion at =0.05. d) Compare the two tests. Look at the histogram and qq plots for the MSCE for each race t. Discuss whether the distributions are normal enough or not to use the t-test. Which method, t-test or Wilcoxon Rank Sum test, is the best method? In this problem, why is it important to choose the correct test? 2) The file MSCE is a tab delimited file on genetic data that compare races with respect to MSCE (mean sister chromatid exchange). There are four races in the file: Caucasian, Black, NativeAm and Asian. We are only interested in Caucasian and NativeAm. a) Open the tab delimited file using the infile command and DLM = ' 09X. Be sure to put the 09 in quotes. In this same data step, subset the data to only include Caucasian and NativeAm as the races of interest. b) Write SAS codes to perform a t-test using Proc Ttest. (a)Write the null and alternative hypothesis in words. (b) Indicate whether you should use the pooled or unspooled variance and why. (c) State the value of test statistic. (d) State your p-value and conclusion at =0.05. (e) State the 95% Confidence Interval and interpret it (explain what it tells us). c) Write SAS codes to perform a Wilcoxon Sum Rank test. (a) Write the null and alternative hypothesis in words. (b) State the value of test statistic. (c) State your p-value and conclusion at =0.05. d) Compare the two tests. Look at the histogram and qq plots for the MSCE for each race t. Discuss whether the distributions are normal enough or not to use the t-test. Which method, t-test or Wilcoxon Rank Sum test, is the best method? In this problem, why is it important to choose the correct test