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4. You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 40.3. You would like to be 99% confident that your estimate is within 4 of the true population mean. How large of a sample size is required? Round up to nearest whole number. Don't forget to show what you typed into your calculator.

4. You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 40.3. You would like to be 99% confident that your estimate is within 4 of the true population mean. How large of a sample size is required? Round up to nearest whole number. Don't forget to show what you typed into your calculator.

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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b. (5 pts) For the group of 11, find the probability that the average price is between $160 and $165. c. (5 pts) Find the third quartile for the average textbook price for this sample size. Round your answer to the nearest cent. d. (5 pts) For part b, is the assumption that the distribution is normal necessary? Explain your answer. H Don't forget to show what you typed into your 4. You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 40.3. You would like to be 99% confident that your estimate is within 4 of the true population mean. How large of a sample size is required? Round up to nearest whole number. Don't forget to show what you typed into your calculator. 5. The standard deviation of the weights of year-old cows is known to be 80 pounds. A scientist is interested in finding a 95% confidence interval for the mean weight of year-old cows. The scientist weighs 52 cows. The sample mean is 1250 pounds and the standard deviation is 78 pounds. Choose (5 pts) Which distribution do vou use to compute a confidence interval? calculator. Q Search fl AR
Transcribed Image Text:b. (5 pts) For the group of 11, find the probability that the average price is between $160 and $165. c. (5 pts) Find the third quartile for the average textbook price for this sample size. Round your answer to the nearest cent. d. (5 pts) For part b, is the assumption that the distribution is normal necessary? Explain your answer. H Don't forget to show what you typed into your 4. You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 40.3. You would like to be 99% confident that your estimate is within 4 of the true population mean. How large of a sample size is required? Round up to nearest whole number. Don't forget to show what you typed into your calculator. 5. The standard deviation of the weights of year-old cows is known to be 80 pounds. A scientist is interested in finding a 95% confidence interval for the mean weight of year-old cows. The scientist weighs 52 cows. The sample mean is 1250 pounds and the standard deviation is 78 pounds. Choose (5 pts) Which distribution do vou use to compute a confidence interval? calculator. Q Search fl AR
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