# 1 - the interval What does it mean 3 Test to see if a...

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1. What does a confidence interval tell you? What does it mean? What two things can a researcher do to reduce the width of a confidence interval? What are the effects? 2. Compute the 95% confidence interval on the population mean if a sample of 1000 is taken and the sample mean is found to be 15.95 and standard deviation is 4.2. Interpret
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Unformatted text preview: the interval. What does it mean? 3. Test to see if a population mean is greater than the assumed (or historical) value of 16. When a sample of 1000 was taken the sample mean was computed to be 15.95 and the sample standard deviation was 4.2. --...
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## This note was uploaded on 04/14/2009 for the course BUSINESS Res 320 taught by Professor Diaz during the Spring '09 term at University of Phoenix.

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