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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 correct 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: 16, 15, 19, 9, 17, 21, 21, 16, 17, 16, 23, 20, 22, 19, 21, 16, 23, 15, 21, and 15. a. What are the upper and lower control limits for the appropriate p-chart for the IRS? Use z=3. The UCL, equals and the LCL, equals (Enter your responses rounded to four decimal places. If your answer for LCL, is negative, enter this value as 0.)

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 correct 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: 16, 15, 19, 9, 17, 21, 21, 16, 17, 16, 23, 20, 22, 19, 21, 16, 23, 15, 21, and 15. a. What are the upper and lower control limits for the appropriate p-chart for the IRS? Use z=3. The UCL, equals and the LCL, equals (Enter your responses rounded to four decimal places. If your answer for LCL, is negative, enter this value as 0.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 10CYU
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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 correct 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: 16, 15, 19, 9, 17, 21, 21, 16, 17, 16, 23, 20, 22, 19, 21, 16, 23, 15, 21, and 15. a. What are the upper and lower control limits for the appropriate p-chart for the IRS? Use z = 3. The UCL, equals and the LCL, equals (Enter your responses rounded to four decimal places. If your answer for LCL is negative, enter this value as 0.)
Transcribed Image Text: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 correct 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: 16, 15, 19, 9, 17, 21, 21, 16, 17, 16, 23, 20, 22, 19, 21, 16, 23, 15, 21, and 15. a. What are the upper and lower control limits for the appropriate p-chart for the IRS? Use z = 3. The UCL, equals and the LCL, equals (Enter your responses rounded to four decimal places. If your answer for LCL is negative, enter this value as 0.)
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