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The random sample shown below was selected from a normal distribution. 3,3,3,9,10,8 a. Construct a 95% confidence interval for the population mean µ. b. Assume that sample mean x? and sample standard deviation s remain exactly the same as those you just calculated but that are based on a sample of n=25 observations. Repeat part a. what is the effect of increasing the sample size on the width of the confidence intervals.

Guest Jun 20, 2015

Best Answer 

 #1
avatar+26971 
+10

Confidence intervals:

.

Alan  Jun 20, 2015
 #1
avatar+26971 
+10
Best Answer

Confidence intervals:

.

Alan  Jun 20, 2015
 #2
avatar+93305 
+5

Thanks Alan,

I have added this into our reference material posts.

Melody  Jun 20, 2015

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