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A random sample of 40 students has a mean annual earnings of $3120 and assume that the population standard devi E.... O A. $210 O B. $2891 O C. $77 O D. $7

A random sample of 40 students has a mean annual earnings of $3120 and assume that the population standard devi E.... O A. $210 O B. $2891 O C. $77 O D. $7

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 random sample of 40 students has a mean annual earnings of $3120 and assume that the population standard deviation is $677. Find the margin of error if c=0.95. O A. $210 O B. $2891 OC. $77 O D. $7
Transcribed Image Text:A random sample of 40 students has a mean annual earnings of $3120 and assume that the population standard deviation is $677. Find the margin of error if c=0.95. O A. $210 O B. $2891 OC. $77 O D. $7
A random sample of 56 fluorescent light bulbs has a mean life of 645 hours and assume that the population standard deviation is 31 hours. Construct a 95% confidence interval for the population mean. OA. (712.0,768.0) O B. (636.9,653.1) OC. (112.0,118.9) O D. (539.6,551.2)
Transcribed Image Text:A random sample of 56 fluorescent light bulbs has a mean life of 645 hours and assume that the population standard deviation is 31 hours. Construct a 95% confidence interval for the population mean. OA. (712.0,768.0) O B. (636.9,653.1) OC. (112.0,118.9) O D. (539.6,551.2)
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