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End Result Hospital has implemented a program to reduce the incidence of pressure ulcers. The table below shows the number of pressure ulcers observed before
End Result Hospital has implemented a program to reduce the incidence of pressure ulcers. The table below shows the number of pressure ulcers observed before and after the program was implemented. Determine the Chitest, critical value, and test statistic. Was the program successful? Observed Pressure Ulcer No PressureUlcer Total Preimplementation 11 89 100 Postimplementation 3 97 100 Total 14 186 200 Marginal probability 7% 93% 100% Expected Pressure Ulcer No Pressure Ulcer Total Preimplementation 7 93 100 Postimplementation 7 93 100 Total 14 186 200 Chitest 2.66% Chiinv - test stat 4.92 Chiinv - critical value 3.84
| End Result Hospital has implemented a program to reduce the incidence of pressure ulcers. The table below shows the number of pressure ulcers observed before and after the program was implemented. Determine the Chitest, critical value, and test statistic. Was the program successful? | |||
| Observed | Pressure Ulcer | No PressureUlcer | Total |
| Preimplementation | 11 | 89 | 100 |
| Postimplementation | 3 | 97 | 100 |
| Total | 14 | 186 | 200 |
| Marginal probability | 7% | 93% | 100% |
| Expected | Pressure Ulcer | No Pressure Ulcer | Total |
| Preimplementation | 7 | 93 | 100 |
| Postimplementation | 7 | 93 | 100 |
| Total | 14 | 186 | 200 |
| Chitest | 2.66% | ||
| Chiinv - test stat | 4.92 | ||
| Chiinv - critical value | 3.84 |
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Linear Algebra and Its Applications
Authors: Gilbert Strang
4th edition
30105678, 30105676, 978-0030105678
