One-sample Z-Test for Proportions

1. Calculate the mortality rate for the sample of patients discharged with MS-DRG 291

2. Determine the mortality rate for MS-DRG 291 for Medicare patients in 2011 from the HCUP website.

3. Test the hypothesis that the mortality rate for the hospital that generated the sample data is different from the US rate.

4. Select an appropriate alpha level. (0.05)

2011 National statistics Outcomes for Diagnosis Related Group 291 Heart failure & shock w mcc Standard errors Total number of discharges In-hospital deaths Total number of discharges In-hospital deaths All discharges 303,184 (100.00%) 17,597 (5.80%%) 7,589 543 (0.14%) Payer Medicare 242 877 (80.11%) 14,474 (5.96%) 6,214 457 (0.15%) Medicald 20,345 (6.71%) 642 (3.16%) 1,038 60 (0.27%) Private insurance 28,641 (9.45 3) 1,655 (5.78%%) 1,427 140 (0.40%) Uninsured 6,317 (2.08%%) 259 (4.10%%) 372 44 (0.66%) Other 4,148 (1.37%) 473 (11.41%) 411 77 (1.68%) Missing 856 (0.28%%) 222