1. The Apheresis Unit at Monument Health System has experienced an increasing demand for several of its procedures. Unfortunately, the Apheresis Unit itself is small, and its ability to accept additional patients is very much limited by capacity: physical space, available beds, personnel, and current equipment. In order to evaluate the unit's current performance, equipment availability, and opportunities for work flow improvement, the unit brought in a consultant to perform time studies for three of its most demanded procedures: stem cell pheresis, white blood cell (WBC) pheresis, and plateletpheresis.
   1. The consultant collected twenty-five retrospective observations of stem cell procedures from the Apheresis database, shown in the table below. Determine the number of observations needed for 95.5 percent confidence level with 5 percent error.

2. The consultant also collected twelve observations of the WBC pheresis procedure, shown in the table below. Determine the number of observations needed for a 99 percent confidence level with 3 percent error.

3. The consultant collected eight observations of the plateletpheresis procedure, shown in the table below. Determine the number of observations needed for a 95.5 percent confidence level with 7 percent error.

d. If a sample size of 50 is used for each procedure, what would be the potential error for the estimate of each procedure?

b. The consultant also collected twelve observations of the WBC pheresis procedure, shown in the table below. Determine the number of observations needed for a 99 percent confidence level with 3 percent error. 3. The Apheresis Unit at Monument Health System has experienced an increasing demand for several of its procedures. Unfortunately, the Apheresis Unit itself is small, and its ability to accept additional patients is very much limited by capacity: physical space, available beds, personnel, and current equipment. In order to evaluate the unit's current performance, equipment availability, and opportunities for work flow improvement, the unit brought in a consultant to perform time studies for three of its most demanded procedures: stem cell pheresis, white blood cell (WBC) pheresis, and plateletpheresis. Prep Time Consult Time Procedure Time Completion Time Total Time 25 30 180 30 265 25 0 136 30 191 25 0 130 30 185 25 0 185 25 235 25 0 161 15 201 25 150 190 30 395 25 0 152 15 192 25 85 141 40 291 25 60 184 15 284 25 0 167 20 212 25 0 150 40 215 25 0 160 30 215 C. The consultant collected eight observations of the plateletpheresis procedure, shown in the table below. Determine the number of observations needed for a 95.5 percent confidence level with 7 percent error. a. The consultant collected twenty-five retrospective observations of stem cell procedures from the Apheresis database, shown in the table below. Determine the number of observations needed for 95.5 percent confidence level with 5 percent error. Consult Procedure Completion Prep Time Total Time Time Time Time 45 45 345 40 475 30 0 310 40 380 25 50 278 15 368 30 0 276 20 326 25 0 312 30 399 40 45 289 25 399 35 0 283 30 348 25 0 283 25 333 25 23 271 30 349 25 0 300 30 350 25 0 301 15 341 25 35 311 30 401 25 0 370 50 445 25 0 369 45 439 75 0 320 25 420 25 0 302 40 367 25 45 288 40 398 25 0 320 25 370 30 0 321 15 366 25 25 308 30 388 25 0 300 20 345 25 0 300 60 385 40 25 282 45 392 30 0 322 15 367 25 0 321 30 376 Prep Time Consult Time Procedure Time Completion Time Total Time 25 50 120 15 210 25 60 120 20 225 25 65 120 15 225 25 0 120 40 185 25 90 120 20 255 25 0 120 15 160 25 0 140 20 185 25 0 120 25 170 d. If a sample size of 50 is used for each procedure, what would be the potential error for the estimate of each procedure? Prep Time Total Time 45 30 25 30 25 40 35 25 25 25 25 25 25 25 75 25 25 25 30 25 25 25 40 30 25 Consult Time 45 0 50 0 0 45 0 0 23 0 0 35 0 0 0 0 45 0 0 25 0 0 25 0 0 Procedure Time 345 310 278 276 312 289 283 283 271 300 301 311 370 369 320 302 288 320 321 308 300 300 282 322 321 Completion Time 40 40 15 20 30 25 30 25 30 30 15 30 50 45 25 40 40 25 15 30 20 60 45 15 30 475 380 368 326 399 399 348 333 349 350 341 401 445 439 420 367 398 370 366 388 345 385 392 367 376 Prep Time Consult Time Procedure Time Completion Time Total Time 25 30 180 30 265 25 0 136 30 191 25 0 130 30 185 25 0 185 25 235 25 0 161 15 201 25 150 190 30 395 25 0 152 15 192 25 85 141 40 291 25 60 184 15 284 25 0 167 20 212 25 0 150 40 215 25 0 160 30 215 NNNN | Prep Time Consult Time Procedure Time Completion Time Total Time 25 50 120 15 210 25 60 120 20 225 25 65 120 15 225 25 0 120 40 185 25 90 120 20 255 25 0 120 15 160 25 0 140 20 185 25 0 120 25 170 b. The consultant also collected twelve observations of the WBC pheresis procedure, shown in the table below. Determine the number of observations needed for a 99 percent confidence level with 3 percent error. 3. The Apheresis Unit at Monument Health System has experienced an increasing demand for several of its procedures. Unfortunately, the Apheresis Unit itself is small, and its ability to accept additional patients is very much limited by capacity: physical space, available beds, personnel, and current equipment. In order to evaluate the unit's current performance, equipment availability, and opportunities for work flow improvement, the unit brought in a consultant to perform time studies for three of its most demanded procedures: stem cell pheresis, white blood cell (WBC) pheresis, and plateletpheresis. Prep Time Consult Time Procedure Time Completion Time Total Time 25 30 180 30 265 25 0 136 30 191 25 0 130 30 185 25 0 185 25 235 25 0 161 15 201 25 150 190 30 395 25 0 152 15 192 25 85 141 40 291 25 60 184 15 284 25 0 167 20 212 25 0 150 40 215 25 0 160 30 215 C. The consultant collected eight observations of the plateletpheresis procedure, shown in the table below. Determine the number of observations needed for a 95.5 percent confidence level with 7 percent error. a. The consultant collected twenty-five retrospective observations of stem cell procedures from the Apheresis database, shown in the table below. Determine the number of observations needed for 95.5 percent confidence level with 5 percent error. Consult Procedure Completion Prep Time Total Time Time Time Time 45 45 345 40 475 30 0 310 40 380 25 50 278 15 368 30 0 276 20 326 25 0 312 30 399 40 45 289 25 399 35 0 283 30 348 25 0 283 25 333 25 23 271 30 349 25 0 300 30 350 25 0 301 15 341 25 35 311 30 401 25 0 370 50 445 25 0 369 45 439 75 0 320 25 420 25 0 302 40 367 25 45 288 40 398 25 0 320 25 370 30 0 321 15 366 25 25 308 30 388 25 0 300 20 345 25 0 300 60 385 40 25 282 45 392 30 0 322 15 367 25 0 321 30 376 Prep Time Consult Time Procedure Time Completion Time Total Time 25 50 120 15 210 25 60 120 20 225 25 65 120 15 225 25 0 120 40 185 25 90 120 20 255 25 0 120 15 160 25 0 140 20 185 25 0 120 25 170 d. If a sample size of 50 is used for each procedure, what would be the potential error for the estimate of each procedure? Prep Time Total Time 45 30 25 30 25 40 35 25 25 25 25 25 25 25 75 25 25 25 30 25 25 25 40 30 25 Consult Time 45 0 50 0 0 45 0 0 23 0 0 35 0 0 0 0 45 0 0 25 0 0 25 0 0 Procedure Time 345 310 278 276 312 289 283 283 271 300 301 311 370 369 320 302 288 320 321 308 300 300 282 322 321 Completion Time 40 40 15 20 30 25 30 25 30 30 15 30 50 45 25 40 40 25 15 30 20 60 45 15 30 475 380 368 326 399 399 348 333 349 350 341 401 445 439 420 367 398 370 366 388 345 385 392 367 376 Prep Time Consult Time Procedure Time Completion Time Total Time 25 30 180 30 265 25 0 136 30 191 25 0 130 30 185 25 0 185 25 235 25 0 161 15 201 25 150 190 30 395 25 0 152 15 192 25 85 141 40 291 25 60 184 15 284 25 0 167 20 212 25 0 150 40 215 25 0 160 30 215 NNNN | Prep Time Consult Time Procedure Time Completion Time Total Time 25 50 120 15 210 25 60 120 20 225 25 65 120 15 225 25 0 120 40 185 25 90 120 20 255 25 0 120 15 160 25 0 140 20 185 25 0 120 25 170