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The research department at Riverside community hospital wanted to know if patient satisfaction was better at their hospital. The average satisfaction rating for all hospitals

The research department at Riverside community hospital wanted to know if patient satisfaction was better at their hospital. The average satisfaction rating for all hospitals were 7.8 (on a 1-10 scale) with a sigma of .5. The average satisfaction for Riverside community hospital was 8.1 with a standard deviation of 1.5. What test should be used?

A. Independent t test

B. t-test (one sample)

C. All the choices are correct

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