QUESTION 14 A retail store manager is trying to improve and control the rate at which cashiers sign customers up for store credit cards. The manager takes several samples of size 50. He finds that each sample of 50 contained 11 credit card signups on average. Find UCL for p- bar using 99.73% control limits. (enter your answer to 4 decimal places) Click Save and Submit to save and submit. Click Save All Answers to save all answers. TABLE S6.2 Common z Values DESIRED CONTROL LIMIT (%) 90.0 95.0 95.45 99.0 99.73 Z-VALUE (STANDARD DEVIATION REQUIRED FOR DESIRED LEVEL OF CONFIDENCE 1.65 1.96 2.00 2.58 3.00 Setting Limits-p Chart UCL or LCLp = p zop where op p(1-P) n = mean fraction (percent) defective in the samples 2= number of standard deviations a standard deviation of the sampling distribution = number of observations in each sample