Question

This Question: 1 pt 5 of 15 (3 complete) This Test: 15 pts possit Question Help In a random sample of 18 people, the mean commute time to work was 34.7 minutes and the standard deviation was 73 minutes. Assume the population is normally distributed and use a t-distribution to construct a 95% confidence interval for the population mean . What is the margin of error of Interpret the results The confidence interval for the population mean is ( (Round to one decimal place as needed) The margin of error of (Round to one decimal place as needed.) Interpret the results OA With 95% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval OB. It can be said that 95% of people have a commute time between the bounds of the confidence interval O C. With 95% confidence, it can be said that the commuto time is between the bounds of the confidence interval OD. large sample of people weken approximately 95% of them will have commute times between the bounds of the confidence interval Cick to select your answer(s) Previous

Answer 1

Solution D=18 = 34.7. 7.3. 95% Confidence interval is Itzi 2 * = 1.96 sla 8 - 7.3. 34.7 1.96 x 7.3 118. ( 34.7 - 3:37, 34.7 + 3-37) • The confidence interval for the Population Mean u is 31.3) 138.1 Z .S of erooo Mary in : 1.96 * 7.3 vie = 13.4 Vn loption a with asi confidence, it can be said that the Commute trime between the bounds of the confidence inteoval.