Using the ROI data set:
- For each of the 2 majors test the hypothesis at the 5% significance level:
- The mean â€˜Costâ€™ 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):
- The average â€™30-Year ROIâ€™ for Business majors is less than for Engineering Majors. Be sure to interpret your results.File Attached