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A simple random sample of size n=40 is drawn from a population. The sample mean is found to be x = 121.3 and the sample standard deviation is found to be s= 12.8. Construct a 99% confidence interval for the population mean The lower bound is (Round to two decimal places as needed.)

A simple random sample of size n=40 is drawn from a population. The sample mean is found to be x = 121.3 and the sample standard deviation is found to be s= 12.8. Construct a 99% confidence interval for the population mean The lower bound is (Round to two decimal places as needed.)

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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A simple random sample of size \( n = 40 \) is drawn from a population. The sample mean is found to be \( \bar{x} = 121.3 \) and the sample standard deviation is found to be \( s = 12.8 \). Construct a 99% confidence interval for the population mean. The lower bound is \(\_\) (Round to two decimal places as needed.)
Transcribed Image Text:A simple random sample of size \( n = 40 \) is drawn from a population. The sample mean is found to be \( \bar{x} = 121.3 \) and the sample standard deviation is found to be \( s = 12.8 \). Construct a 99% confidence interval for the population mean. The lower bound is \(\_\) (Round to two decimal places as needed.)
In a random sample of 64 audited estate tax returns, it was determined that the mean amount of additional tax owed was $3,484 with a standard deviation of $2,519. Construct and interpret a 90% confidence interval for the mean additional amount of tax owed for estate tax returns. --- Find and interpret a 90% confidence interval for the mean additional amount of tax owed for estate tax returns. Select the correct choice below and fill in the answer boxes to complete your choice (Use ascending order. Round to the nearest dollar as needed). A. One can be 90% confident that the mean additional tax owed is between $[ ] and $[ ]. B. 90% of taxes owed for estate tax returns are between $[ ] and $[ ]. C. There is a 90% probability that the mean additional tax owed is between $[ ] and $[ ].
Transcribed Image Text:In a random sample of 64 audited estate tax returns, it was determined that the mean amount of additional tax owed was $3,484 with a standard deviation of $2,519. Construct and interpret a 90% confidence interval for the mean additional amount of tax owed for estate tax returns. --- Find and interpret a 90% confidence interval for the mean additional amount of tax owed for estate tax returns. Select the correct choice below and fill in the answer boxes to complete your choice (Use ascending order. Round to the nearest dollar as needed). A. One can be 90% confident that the mean additional tax owed is between $[ ] and $[ ]. B. 90% of taxes owed for estate tax returns are between $[ ] and $[ ]. C. There is a 90% probability that the mean additional tax owed is between $[ ] and $[ ].
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