question 4 and 5

Question 4 0/4 pts 9 10 = 4 0 Details A newsgroup is interested in constructing a 9% confidence interval for the proportion of all Americans who are in favor of a new Green initiative. Of the 523 randomly selected Americans surveyed, 355 were in favor of the initiative. a. With 99% confidence the proportion of all Americans who favor the new Green initiative is between and b. If many groups of 523 randomly selected Americans were surveyed, then a different confidence interval would be produced from each group. About . percent of these confidence intervals will contain the true population proportion of Americans who favor the Green initiative and about percent will not contain the true population proportion. Hint: Hints Video Textbook El Question Help: Message instructor Submit Question Question 5 0/5 pts 9 10 ~ 4 @ Details A fitness center is interested in finding a 90% 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 15 members were looked at and their mean number of visits per week was 3.2 and the standard deviation was 1.7. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? v distribution. b. With 90% confidence the population mean number of visits per week is between and visits. c. If many groups of 15 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 number of visits per week. Hint: Hints Video = [+] Question Help: Message instructor Submit