A hospital director is told that 22%

22% of the treated patients are uninsured. The director wants to test the claim that the percentage of uninsured patients is above the expected percentage. A sample of 440

440 patients found that 110

110 were uninsured. At the 0.02

0.02 level, is there enough evidence to support the director's claim?

Steps:

State the null and alternative hypotheses.

The Value of Test statistics

The z-critical value

Decision