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2. A health insurance company wants to know the percentage of its policyholders, who have tried...

2. A health insurance company wants to know the percentage of its policyholders, who have tried alternative (e.g. herbal) treatments. A random sample of 20 of the company’s policyholders were asked whether or not (Yes or No) they have ever tried such treatment. Below are their responses:

Yes Yes Yes Yes Yes Yes No Yes Yes No Yes Yes Yes Yes No Yes Yes Yes Yes No

a. What is the point estimate of the corresponding population proportion?

b. Construct a 92% confidence interval for the percentages of this company’s policyholders who have tried alternative treatments.

c. Interpret the confidence interval.

Math   Statistics-And-Probability   
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