(Answered) A physician with a practice is currently serving

Statistics

A physician with a practice is currently serving 290 patients. The physician would like to administer a survey to his patients to measure their satisfaction level with his practice. A random sample of 22 patients had an average satisfaction score of 7.7on a scale of? 1-10. The sample standard deviation was 1.8. Complete parts a and b below.

a. Construct a? 99% confidence interval to estimate the average satisfaction score for the? physician's practice.

The? 99% confidence interval to estimate the average satisfaction score is ( ____ , _____ )

What assumption needs to be made for this? analysis?

A.The population standard deviation is known.

B.The population is normally distributed.

C.The sample size is less than? 5% of the population.

D.There are no assumptions needed for this analysis.

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