Question: please show formulas in excel Q3. Constructing an X-chart AND an R-chart At ABC Super Store, the customer service area processes customer returns, answers customer

please show formulas in excel

Q3. Constructing an X-chart AND an R-chart At ABC Super Store, the customer service area processes customer returns, answers customer questions and provides information, addresses customer complaints, and sells gift certificates. The manager believes that if customers must wait longer than 8 minutes to see a customer service representative they get very irritated. The customer service process has been designed to achieve a customer wait time of between 6 and 12 minutes. The store manager has conducted 10 samples of 6 observations each of customer waiting over a fun- week periods as follows: Construct an X-chart in conjunction with an R-chart to monitor customer service wait time, and comment on the capability of the service area to meet its designated goal. Month 1 8.6 2 10 3 5.3 4 6.1 12.4 9.7 6.5 15.6 12.5 9.3 14.5 10.3 5 6 7 8 9 10 11 12 4.5 8.9 9.4 11.5 8.3 10.4 5.9 6.6 3.6 7.4 8.6 9.6 Control Chart Factors for Xhar and R Charts Mean Upper Factor, Range, D4 A2 1.88 3.268 1.023 2.574 0.729 2.282 0.577 2.115 0.483 2.004 0.419 1.924 0.373 1.864 0.337 1.816 0.308 1.777 0.285 1.744 0.266 1.716 0.249 1.692 0.235 1.671 0.223 1.652 0.212 1.636 0.203 1.621 0.194 1.608 0.187 1.596 0.180 1.586 0.173 1.575 0.167 1.566 0.162 1.557 0.157 1.548 0.153 1.541 Sample size, n 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Response Times (mins) 6.2 5.7 7.3 8.1 10.2 10.2 9.3 9.4 12.4 10.1 7.5 8.5 5.6 7.7 10.6 11.5 8.5 6.4 9.9 10.4 9.3 5.3 11.2 7.5 10.1 6.4 5.8 9.6 8.4 12 9.1 7.5 9.6 14.3 10.6 6.9 Lower Range, D3 0 0 0 0 0 0.076 0.136 0.184 0.223 0.256 0.284 0.308 0.329 0.348 0.364 0.379 0.392 0.404 0.414 0.425 0.434 0.443 0.452 0.459 11.5 8.6 7.8 8.5 6.4 7.6 8.8 10.6 9.1 11.9 11.8 8.1

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