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What is the lower limit of the 99% confidence interval for a population variance when s=3 and n=20?

What is the lower limit of the 99% confidence interval for a population variance when s=3 and n=20?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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7. What is the lower limit of the 99% confidence interval for a population variance when s=3 and n = 20? 8. 50 randomly selected statistics students were asked if they actually read their statistics textbook. 35 responded that they do not read the textbook. What is the value of p for this sample? 9. A certain randomly selected sample of 125 registered voters showed that 20% of them voted in the most recent school board election. How many of these voters actually voted in that election? Construct a 95% confidence interval for the proportion of registered voters who voted in the most recent school board election. I 10. We want to construct a confidence interval for a population mean. We want to be 95% confident with a margin of error of 1.5. We know that o= 10.5. How large should our sample be? 11. We want to construct a confidence interval for a population proportion. We want to be 99% confident with a margin of error of 0.03. We do not know an estimate for p. How large should our sample be? 7-10 Copyright © 2018 Pearson Education, Inc.
Transcribed Image Text:7. What is the lower limit of the 99% confidence interval for a population variance when s=3 and n = 20? 8. 50 randomly selected statistics students were asked if they actually read their statistics textbook. 35 responded that they do not read the textbook. What is the value of p for this sample? 9. A certain randomly selected sample of 125 registered voters showed that 20% of them voted in the most recent school board election. How many of these voters actually voted in that election? Construct a 95% confidence interval for the proportion of registered voters who voted in the most recent school board election. I 10. We want to construct a confidence interval for a population mean. We want to be 95% confident with a margin of error of 1.5. We know that o= 10.5. How large should our sample be? 11. We want to construct a confidence interval for a population proportion. We want to be 99% confident with a margin of error of 0.03. We do not know an estimate for p. How large should our sample be? 7-10 Copyright © 2018 Pearson Education, Inc.
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