1. What is the value of the Upper Control Limit (UCL) for the p-chart? 2. What is the value of the Lower Control Limit (LCL) for the p-chart? 3. Is the process in control? 4. Use the UCL and the LCL calculated using Samples 1 through 5. Now suppose that there are 9 defects in the next sample (Sample #6). Without recalculating the control limits, would the process be in control? 12 P Total Number of defective units from all Samples Number of Samples x Sample Size P(1-P) n UCL = P + Zsp UCLp = p + Zsp Sample size (n) = 20. Use a standard deviation (z) of 3. Sample Number LCL, = pzsp, or 0 if less than 0 Sample Size 20 20 20 20 20 Number of Defects 1 6 3 0 1 2 3 4 5 *Note: If you are told in a problem the sample size you may not have a column in the table listing the sample size. The sample size will be the same for all samples. 5