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Author Question: The office manager for an ophthalmologist wants to estimate the average time that the doctor spends ... (Read 191 times)

lak

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on: Jun 24, 2018
The office manager for an ophthalmologist wants to estimate the average time that the doctor spends with each patient in order to better schedule appointments. A random sample of 49 is taken and the sample mean is 20.3 minutes. Assume that the office manager knows from past experience that the standard deviation is 14 minutes. She finds that a 95 confidence interval is between 18.3 and 22.3 minutes. What is the point estimate of the population mean? What is the confidence coefficient?

Question 2

The temperature readings for 20 winter days in Big Rapids, Michigan are normally distributed with a mean 5.5 degrees and a standard deviation of 1.5 . Determine the 90 confidence interval estimate for the winter mean temperature. ___________________ _ to ___________________ _
 Fill in the blank(s) with correct word


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macagn

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Reply #1 on: Jun 24, 2018
Answer to Question 1

20.3; 0.95

Answer to Question 2

4.948; 6.052


lak

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Reply #2 on: Jun 24, 2018
Thank you :)


macagn

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Reply #3 on: Jun 24, 2018
Happy to help you


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