D2L 6-2 Participation Activities: Confic X Course Hero X zy Section 6.2 - MAT 240: Applied St X + X - -> C D a learn.zybooks.com/zybook/MAT-240-J1578-OL-TRAD-UG.22EW1/chapter/6/section/2 =zyBooks My library > MAT 240: Applied Statistics home > 6.2: Confidence intervals for population means zyBooks catalog ? Help/FAQ Steve Atwell The confidence interval is [i - m, x + m] = [12 - 0.546, 12 + 0.546] = [11.454, 12.546] Feedback? CHALLENGE ACTIVITY 6.2.2: Relating confidence intervals to hypothesis testing (one sample). 426854.2603902.qx3zqy7 Start An auto maker is interested in information about how long transmissions last. A sample of transmissions are run constantly and the number of miles before the transmission fails is recorded. The auto maker claims that the transmissions can run constantly for over 150,000 miles before failure. The results of the sample are given below. Miles (1000s of miles) Mean 150.7 Variance 4.551 Observations 42 Hypothesized Mean 150 df 41 t Stat 2.17 p = Ex: 1.234 P(T