One Sample T-Test Test the hypothesis that the sample mean LOS for MS-DRG 291 is different from the national standard. Obtain the national Medicare LOS from HCUP.Be sure to state the null and alternative hypotheses and set the alpha prior to performing the test. Two Sample T-Test Test the hypothesis that charges for patients with MS-DRG 291 are different for men and women. Be sure to state the null and alternative hypotheses and set the alpha prior to performing the test. LOS Mean 6.997319 Standard Error 0.285764 Median 5 Mode 4 Standard Deviation 5.519028 Sample Variance 30.45967 Kurtosis 11.28008 Skewness 2.599359 Range 46 Minimum 1 Maximum 47 Sum 2610 Count 373 Confidence Level (95.0%) | 0.561916HCPU 2012 National statistics Outcomes for Diagnosis Related Group 291 Heart failure & shock w mcc Standard errors Total number of discharges LOS (length of stay), days (mean) Total number of discharges LOS (length of stay), days (mean) All discharges 298,270 (100.00%) 5.9 3,797 0.031 Payer Medicare 239,035 (80.14%) 5.9 3,232 0.032 Medicald 21,135 (7.09%) 6.1 560 0.105 Private insurance 26,085 (8.75%) 5.6 666 0.082 Uninsured 6,785 (2.27%) 5.4 310 0.136 Other 4,560 (1.53%) 5.5 228 0.187 Missing 670 (0.22%) 5.3 159 0.351