Announcements Section 9.2 Homework Progress saved Score: 6/13 7/13 answered Done C Account Syllabus Modules Grades 35 People Cypress College Library Resources Student Services Question 5 < > 0/1 pt 3 2 Details € Dashboard A fitness center is interested in finding a 95% confidence interval for the mean number of days per week that Americans who are members of a fitness club go to their fitness center. Records of 239 randomly selected members were looked at and their mean number of visits per week was 3.1 and the standard deviation was 2.9. Round answers to 1 decimal place where possible. a. To compute the confidence interval use a ? distribution. b. With 95% confidence the population mean number of visits per week is between + 01 Courses Calendar B Inbox and visits. History Y ent wort c. If many groups of 239 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of visits per week and about percent will not contain the true population mean Student Support number of visits per week. Hint: Hints llett cover Video [+] Follett Discover Studio Help Submit Question Studio ? Help

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