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Author Question: The formula for a confidence interval for the population mean is based on the rule for sample means, ... (Read 86 times)

melly21297

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on: Jul 24, 2018
The formula for a confidence interval for the population mean is based on the rule for sample means, which has assumptions that need to be met. What are those assumptions? (Hint: there are different assumptions depending on whether or not the population is bell-shaped.)

Question 2

What three items are needed in order to construct a confidence interval to estimate the mean of a population?


nothere

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

1) IF THE POPULATION IS BELL-SHAPED, ANY SIZE RANDOM SAMPLE CAN BE TAKEN; 2) IF THE POPULATION IS NOT BELL-SHAPED, A LARGE ENOUGH SAMPLE MUST BE TAKEN (AT LEAST 30 MEASUREMENTS).

Answer to Question 2

1) SAMPLE MEAN; 2) SAMPLE STANDARD DEVIATION; 3) SAMPLE SIZE.


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