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Twenty-five wooden beams were ordered for a construction project. The sample mean and the sample standard deviation were measured: x = 230 cm, s = 6 cm. Calculated confidence interval for the mean is [226.64; 233.36]. Which confidence level was chosen? Assume distribution to be normal. O 90% O 99% O 95% ○ 99.9%

Twenty-five wooden beams were ordered for a construction project. The sample mean and the sample standard deviation were measured: x = 230 cm, s = 6 cm. Calculated confidence interval for the mean is [226.64; 233.36]. Which confidence level was chosen? Assume distribution to be normal. O 90% O 99% O 95% ○ 99.9%

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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Twenty-five wooden beams were ordered for a construction project. The sample mean and the sample standard deviation were measured: x = 230 cm, s = 6 cm. Calculated confidence interval for the mean is [226.64; 233.36]. Which confidence level was chosen? Assume distribution to be normal. O 90% O 99% O 95% O 99.9%
Transcribed Image Text:Twenty-five wooden beams were ordered for a construction project. The sample mean and the sample standard deviation were measured: x = 230 cm, s = 6 cm. Calculated confidence interval for the mean is [226.64; 233.36]. Which confidence level was chosen? Assume distribution to be normal. O 90% O 99% O 95% O 99.9%
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