A healthcare consultant wants to determine the difference in patient satisfaction ratings of two hospitals.
 Open the sample data, HospitalComparison.MTW.
 Open the bootstrapping for 2sample means dialog box.
 In Samples, enter Rating.
 In Sample IDs, enter Hospital.
 On the Options tab, enter 1 in Base for random number generator.
Note
Using Base for random number generator ensures that your results match the example.
 Click OK.
Interpret the results
The 95% CI indicates that the consultant can be 95% confident that the difference in population means of the patient satisfaction ratings of two hospitals is between 14.4 and 27.6. The histogram shows that the bootstrap distribution appears to be normal, so the consultant can trust the results.

A  20  80.300  8.183  66.958  62.000  79.000  98.000  B  20  59.300  12.431  154.537  35.000  58.500  89.000 

Difference in Observed Means 

Mean of A  Mean of B = 21 

Bootstrap Samples for Difference in Means 

1000  20.960  3.279  (14.400, 27.600) 
