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Find the length of a 99% confidence interval for the mean of the sample with a standard deviation of 4 when the sample size is 18. O a. 5.19 O b. 5.43 Oc. 5.46 Od. 5.20

Find the length of a 99% confidence interval for the mean of the sample with a standard deviation of 4 when the sample size is 18. O a. 5.19 O b. 5.43 Oc. 5.46 Od. 5.20

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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Find the length of a 99% confidence interval for the mean of the samplle with a standard deviation of 4 when the sample size is 18. O a. 5.19 Ob. 5.43 O C. 5.46 Od. 5.20 Find the length of a 90% confidence interval for the mean of the sample with a population standard deviation of 10 when the sample size is 125. Oa. 2.94 Ob. 1.65 Oc. 4.60 O d. 3.51 The standard deviation the life expectancy of an inkjet printer is 3 years. How many printers must be tested in order to be 95% confident that the error of estimate will not exceed 1 year? 20 Ob. 34 Oc. 35 O d. 21
Transcribed Image Text:Find the length of a 99% confidence interval for the mean of the samplle with a standard deviation of 4 when the sample size is 18. O a. 5.19 Ob. 5.43 O C. 5.46 Od. 5.20 Find the length of a 90% confidence interval for the mean of the sample with a population standard deviation of 10 when the sample size is 125. Oa. 2.94 Ob. 1.65 Oc. 4.60 O d. 3.51 The standard deviation the life expectancy of an inkjet printer is 3 years. How many printers must be tested in order to be 95% confident that the error of estimate will not exceed 1 year? 20 Ob. 34 Oc. 35 O d. 21
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