The following random sample was selected from a normal distribution: 4, 6, 3, 5, 9, 3. a.
Question:
The following random sample was selected from a normal distribution: 4, 6, 3, 5, 9, 3.
a. Construct a 90% confidence interval for the population mean m.
b. Construct a 95% confidence interval for the population mean m.
c. Construct a 99% confidence interval for the population mean m.
d. Assume that the sample mean x̅ and sample standard deviation s remain exactly the same as those you just calculated but are based on a sample of n = 25 observations rather than n = 6 observations. Repeat parts a-c. What is the effect of increasing the sample size on the width of the confidence intervals?
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Step by Step Answer:
First we must compute x and s a For confidence coefficient 90 10 and 2 10 2 05 From Table III Append...View the full answer
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Related Book For 
Statistics For Business And Economics
ISBN: 9780134506593
13th Edition
Authors: James T. McClave, P. George Benson, Terry Sincich
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