3. A staff member at UF's Wellness Center is interested in seeing if a new stress reduction program will lower employees systolic blood pressure levels. Twenty people are selected and have their blood pressure measured. Each person then participates in the stress reduction program. One month after the stress reduction program, the systolic blood pressure levels of the employees were measured again. Did the program reduce the average systolic blood pressure level? Note: Differences were taken by taking "before systolic blood pressure" minus "After blood pressure"The 95% confidence interval was (5.6, 10.2).
4. Do males spend less time on Facebook than females? A random sample of 100 male and females was selected. Let muf be the population mean number of hours spent online in facebook for females and let mum be the population mean number of hours spent online in facebook for males. How should we write thealternative hypothesis?
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- Spring '08
- Ripol
- Statistics, systolic blood pressure
