Automatic Zoom 7 You have measured the systolic blood pres

- + Automatic Zoom; 7. You have measured the systolic blood pressure of a random sample of 25 employees of a company located near you. A 95% confidence interval for the mean systolic blood pressure for the employees of this company is (122, 138). Which of the following statements gives a valid interpretation of the confidence level? 95% of the sample of employees have a systolic blood pressure between 122 and 138. b, 95% of the population of employees have a systolic blood pressure between 122 and 138. c. If the procedure were repeated many times, 95% of the resulting confidence intervals would contain the population mean systolic blood pressure d. The probability that the population mean blood pressure is between 122 and 138 is .95 8. If the 98% confidence limits for the population mean are 73 and 80, which of the following could be the 95% confidence limits? a. 73 and 81 b. T2 and 79 c. 72 and 81 d. 74 and 79 e. none ol these 9, A 95% confidence interval for the mean reading ach levement score for a population of third grade studentsis 412, 542). Suppose you compute a 99% confidence interval using the same information Which of the following statements is correct? a. The intervals have the same width. b. The 99% interval is longer. c. The 99% interval is shorter d. None of the above. 5 0

Solution

7.) 95%of the population of employees have a systolic blood pressure between 122 and 138

8.) 72 and 81. Since 95 interval will be wider than 98

9.) The 99% confidence interval will be smaller

12.) I and III

13.) 2.89

14.) 5%

15.) 49.2