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r e 18 1. A team decided to pull a random sample of 100 invoices per day. If the invoice had one or more errors it was defective. The data from the last 25 days are given in the table. Day Invoices Number (a) Construct a p-chart using Numbe Inspecte Defectiv i. 90% confidence interval d ii. 95% confidence interval 1 100 22 iii. 99% confidence interval 2 100 33 (b) Plot the 25 samples collected 3 100 24 (c) Based on the plotted data points using EACH 4 100 20 confidence interval, what comments can you make? 5 100 6 100 24 Answer: 7 100 24 8 100 29 9 100 18 10 100 27 11 100 31 100 26 13 100 31 14 100 24 15 100 22 16 100 22 17 100 29 18 100 31 19 100 21 20 100 26 21 100 24 22 100 32 23 100 17 24 100 25 25 100 21 12