B. Find and interpret a 90% confidence interval for -u. Provide a conclusion pertaining to hypothesis. (10 points) 1. Some people believe that math ability and musical ability have a relationship - that is, people with musical ability also seem to do well in math. A group of researchers decides to test this theory. The researchers randomly select 100 musically gifted individuals and also 150 individuals with no musical talent. Each individual is given a test for math ability. The results are shown below: Musically Gifted Not Musically Gifted x = 88.4 x = 90.6 s = 1.8 n = 100 s = 2.6 n = 150 A. Run an appropriate test to see if the mean math-ability score for those who are musically gifted is significantly higher than that of those who are not musically gifted. Use a 1% level of significance. (22 points) Let = mean math-ability score for those who are musically gifted Let = mean math-ability score for those who are not musically gifted un