D Question 19 1 pts You made a process change to reduce the cycle time of lab tests. The sample cycle time data before and after the change are normal. For the hypothesis test, the process owner proposed to use test of medians. Do you agree with the proposal? Disagree Aeree Question 20 1 pts The defect ratio (Defective diagnosis/Total diagnosis) was too high in the pulmonary department. You made a process change to reduce the defect rate. What hypothesis test will you use to determine whether the change is statistically significant? Test of proportions Test of medias Test of means None of these Question 21 1 pts Hypothesis tests for testing means" may be used in all cases. True Falso U Question 22 1 pts Which of the following is NOT a mistake-proofing technique: Control Plan Limit Switches Check Lists Warning Buzzers Question 23 1 pts Below is a control chart for a customer satisfaction survey. Which one of the following statements is true: 95 90 85 80 75 Satisfaction -Mean 70 -LCL 65 -UCL 60 55 50 Week Werk Week Week Weeb Week We Week Week Week Werk Werk Wet Werk Wee Week Werk Week Week West *211315 10 11 16 17 19 20 1 2 3 7 18 one or The process has too much variation and not stable The process is capable We do not have suthcient informacion to conclude on stability or capability Question 24 1 pts You are evaluating the efficiency of a nursing unit. For each visit, you evaluate the following characteristics: Handwashing, timeliness of response to patient request, administering medication and documentation. Over a period of 100 visits, you have identified the following defects: Handwashing (4), timeliness (2), medication (0), and documentation (6) What is the DPMO of this unit's performance? 30.000 120.000 @ 3x 12%