Using the ROI data set:
1. For each of the 2 majors test the hypothesis at the 5% significance level:
1. The mean ‘Cost’ for a college is $160,000. Be sure to interpret your results.
. For Business versus Engineering majors conduct a two sample test of the hypothesis at the 10% significance level (assume the variances are not equal):
2. The average ’30-Year ROI’ for Business majors is less than for Engineering Majors. Be sure to interpret your results.