Calculate the conditional distribution of Facebook use for each campus setting.
The Pennsylvania State University has its main campus in the town of State College and more than 20 smaller “commonwealth campuses” around the state. The Penn State Division of Student Affairs polled separate random samples of undergraduates from the main campus and commonwealth campuses about their use of online social networking. Facebook was the most popular site, with more than 80% of students having an account. Here is a comparison of Facebook use by undergraduates at the main campus and commonwealth campuses who have a Facebook account:
Use Facebook |
Main Campus |
Commonwealth |
Several times a month or less |
55 |
76 |
At least once a week |
215 |
157 |
At least once a day |
640 |
394 |
Total Facebook users |
910 |
627 |
Calculate the conditional distribution of Facebook use for each campus setting. Write your answers as proportions rounded to two decimal places.
Use Facebook | Main Campus | Commonwealth |
Several Times a Month or Less | ||
At Least Once a Week | ||
At Least Once a Day | ||
Total Facebook Users | 910 | 627 |
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