An air-conditioning repair department manager has compiled data on the primary reason for 41 service calls for the previous week, as shown in the table. Job Number Problem/ Customer Type Job Number Problem/ Customer Type Job Number Problem/ Customer Type
301 O/C 315 F/C 329 O/C
302 O/C 316 F/R 330 O/R
303 O/C 317 O/C 331 W/C
304 O/C 318 W/C 332 N/R
305 N/C 319 F/C 333 O/R
306 F/R 320 F/R 334 N/C
307 W/R 321 W/R 335 F/C
308 W/R 322 N/R 336 W/R
309 W/C 323 F/R 337 F/C
310 W/R 324 F/C 338 N/R
311 O/C 325 N/R 339 O/C
312 F/C 326 F/R 340 N/R
313 W/C 327 N/R 341 O/C
314 N/R 328 F/R
Key:
Problem type: Customer type:
N = Noisy C = Commercial customer
F = Equipment failure R = Residential customer
W = Runs warm
O = Odor
a. Using the data, prepare a check sheet for the problem types for each customer type.
(1) Residential customer type
Residential
Noisy
Failed
Warm
Odor
Totals
(2) Commercial customer type
Commercial
Warm
Noisy
Odor
Failed
Totals

you can lose ranking 2 ways.

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answer; buying the bill at a discount from the face value to be received at maturity;