A manufacturer of drone propellers randomly selects 1000 propellers from the production line each week and inspects them for defects. The number of defective propellers, along with the proportion of defective propellers, is given in the following table for a 20-week period:

For the p chart, find the values for the central line, UCL, and LCL.

Transcribed Image Text:

Week Number Defective 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Total 52 36 27 58 44 21 48 63 32 38 27 43 22 35 41 20 28 37 24 42 738 Proportion Defective 0.052 0.036 0.027 0.058 0.044 0.021 0.048 0.063 0.032 0.038 0.027 0.043 0.022 0.035 0.041 0.020 0.028 0.037 0.024 0.042