Garcias Garage desires to create some colorful charts and graphs to illustrate how reliably its mechanic get under the hood and fix the problem. The historic average for the proportion of customers that return for the same repair within the 30-day warranty period is 0.11. Each month, Garcia tracks 120 customers t see whether they return for warranty repairs. The results are plotted as a proportion to report progress toward the goal. If the control limits are to be set at three standard deviations on either side of the goal, determine the control limits for this chart. In March, 5 of the 120 customers in the sample group returned for warranty repairs. Is the repair process in control? The UCLp equals to three decimal places.) and the LCLp equals (Enter your responses rounded Is the repair process in control? OA. The number of returns for service is beldy average, but the sample proportion is within the control limits, so the repair process is still in control. O B. Since the sample proportion is close to one of the control limits, the results are inconclusive. O C. The sample proportion is within the control limits, so the repair process is not in control O D. The sample proportion is outside the control limits, so the repair process is not in control OE. The sample proportion is outside the control limits, so the repair process is in control. Print The IRS is concerned with improving the accuracy of tax information given by its representatives over the telephone. Previous studies involved asking a set of 25 questions of a large number of IRS telephone representatives to determine the proportion of coIrect responses. Historically, the average proportion of correct responses has been 70 percent. Recently, IRS representatives have been receiving more training. On April 26, the set of 25 tax questions were again asked of 20 randomly selected IRS telephone representatives. The proportions of correct answers were: 20, 9, 19, 21, 15, 16, 21, 16, 17, 16, 22, 17, 23, 16, 18
Garcias Garage desires to create some colorful charts and graphs to i
Garcias Garage desires to create some colorful charts and graphs to illustrate how reliably its mechanic get under the hood and fix the problem. The historic average for the proportion of customers that return for the same repair within the 30-day warranty period is 0.11. Each month, Garcia tracks 120 customers t see whether they return for warranty repairs. The results are plotted as a proportion to report progress toward the goal. If the control limits are to be set at three standard deviations on either side of the goal, determine the control limits for this chart. In March, 5 of the 120 customers in the sample group returned for warranty repairs. Is the repair process in control? The UCLp equals to three decimal places.) and the LCLp equals (Enter your responses rounded Is the repair process in control? OA. The number of returns for service is beldy average, but the sample proportion is within the control limits, so the repair process is still in control. O B. Since the sample proportion is close to one of the control limits, the results are inconclusive. O C. The sample proportion is within the control limits, so the repair process is not in control O D. The sample proportion is outside the control limits, so the repair process is not in control OE. The sample proportion is outside the control limits, so the repair process is in control. Print The IRS is concerned with improving the accuracy of tax information given by its representatives over the telephone. Previous studies involved asking a set of 25 questions of a large number of IRS telephone representatives to determine the proportion of coIrect responses. Historically, the average proportion of correct responses has been 70 percent. Recently, IRS representatives have been receiving more training. On April 26, the set of 25 tax questions were again asked of 20 randomly selected IRS telephone representatives. The proportions of correct answers were: 20, 9, 19, 21, 15, 16, 21, 16, 17, 16, 22, 17, 23, 16, 18
0 Comments