Effect of Lead on IQ Score Listed below are full IQ scores from simple random samples of subjects with low lead exposure, medium lead exposure, and high lead exposure (from Data Set 5 in Appendix B). In using the KruskalWallis test, we must rank all of the data combined, then we must find the sum of the ranks for each sample. Find the sum of the ranks for each of the three samples. Low Lead Level Medium Lead Level High Lead Level 70 72 82 85 90 93 86 92 85 76 71 75 84 86 85 79

Statistics Notes Week of Oct. 24th 9.2: Hypothesis Test for Variables Forming a Null and Alternative Hypothesis Hypothesis Null Hypothesis: The conclusion that there is no correlation between the specified populations, meaning the populations are independent. ● The null hypothesis is written as Ho ● For example, if the sample is meant...