W5 Project Assignment “Project Week 5”

W5 Project Assignment “Project Week 5”

Grantham University Online

Project Week 5

1. For each of the 2 majors consider the ‘School Type’ column.  Assuming the requirements are met, construct a 90% confidence interval for the proportion of the schools that are ‘Private’.  Be sure to interpret your results.

Engineering Major

Based on this sample, we are 90% confident that the proportion of schools that are private in the Engineering field is between -0.63897 and 1.738969

Business Major

Based on this sample, we are 90% confident that the proportion of schools that are private in the Business field is between -0.63395 and 2.23395. The Business major results will have wider intervals since the CI increased.

2. For each of the 2 majors construct a 95% confidence interval for the mean of the column ‘Annual % ROI’.  Be sure to interpret your results.

Business Major

Engineering Major

The CI for both majors says that we can be 95% correct that the mean of the ROI for Business Majors will be less than that of Engineering majors. In this example, the Engineering major data will have a wider interval than that of the Business major data.