anwser part B.

b. is the tax information process in statistical control? how many data points are below or above the control limits if there are any?

4:12 7 Expert Q&A Done 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 reponses. historically the average proportion of correct reponses has been 75 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 answer were: 16,21,19,16,18,15,21,20,17,20,24,18,24,21,19,16,23,16,21,18 what are the upper and lower control limits for the appropriate p-chart for the IRS? use Z=3 (response the UCL p equals and the LCL p equals rounded to four decimal places.) 4:13 F Answer 1 of 1 According to the given dato, Total no. of defects units from all samples. No. of Samples & Sample stope (25-16) + (25-21)+(25-19) +--+ (25-18) 2 25 x 20 B 117/500 F 0.234 0.234-(1-0.234) 25 0.0847 P.(1-P) 7 Given 2 b . Upper central limit Lover control limit. Done 0.434 + 3 (0-0847) 0.4884 p - 20p -0-234-8 (0.0847) -0.020)