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.
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