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industrial enginerring Qc

20. Which statement is correct for the use of the control charts: (2pta) a. P control chart can always be used to control the number of defocis b. C control chart are used to deal with nonconforming data d. U control chart can be used when we have variable sample sire 21. C control of them a. True is preferred to be used when we bave a fixed sample size, (1pu) b. False 22. In a company, U control chart is proposed to be used for Y product to count the number of defects in that product. 25 samples were collected with 5000 tinits (sample sizo) for each sample. The total number of defects in all samples were 7850 . The inspection unit was 100 units. The UCL should be: (2 pts) a. 8.34 b. 9.34 c. 6.34 d. 7.34 23. Given the gauge R\&R study as shown below. Find 2 repotwialey (2pts) Gage R8er Study - ANOVA Method 24. A process is operating to fill bottles of liquids used for medication purposes. If the X bar, s charts are to be used and the current specifications are: (23,15). If the process is currently investigated using 50 samples, sample size is 4 and the UCL of the X bar chart is 22.34 and the summation of Si is equal to 72 . Knowing that fills exceeding the USL are considered as rework and fills less than the LSL are considered as scrap. What is the total percentage of both scrap and rework bottles: (3pts) a. 2.81% b. 2.567% c. 2.345% d. 2.267%