# MartensLA7 - distribution you will use and why. (Make...

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1. You will find the data for #25 loaded in Stat Cruncher on the left side labeled: Ex6_2-25.txt, Click on it to bring up the data set for this problem. You need to use the normal distribution or the t-distribution to construct a 95% confidence interval for the population mean. You need to explain which distribution you will use and why, (Make reference to the table on page 329). Once you have produced the output, click on Options, click on Copy, and paste the output into your solutions file. 2. You will find the data for #26 loaded in Stat Cruncher on the left side labeled: Ex6_2-26.txt, Click on it to bring up the data set for this problem. You need to use the normal distribution or the t-distribution to construct a 95% confidence interval for the population mean. You need to explain which

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Unformatted text preview: distribution you will use and why. (Make reference to the table on page 329). Once you have produced the output, click on Options, click on Copy, and paste the output into your solutions file. Give an interpretation as to what the confidence interval represents. 3. Give an explanation as to why the confidence interval using a t-distribution with a sample size of 15 would be wider than the confidence interval using a normal distribution with a sample size of 50. You may want to make reference to the defintion of the t-distribution on page 325 and the ideas in the flowchart on page 329. Another way to ask the question is how do you think sample size effects the width of the confidence interval?...
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## This note was uploaded on 12/30/2009 for the course MATH 1410 taught by Professor Vergo during the Spring '09 term at Metropolitan Community College- Omaha.

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MartensLA7 - distribution you will use and why. (Make...

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