11 To estimate the average time it takes to assemble a certain computer component, the industrial engineer at an electronic firm timed 25 technicians in the performance of this task, getting a mean of 12.5 minutes and a standard deviation of 2 minutes. Construct a 9896 confidence interval of the actual average time required to do the job assuming that the actual time follows a normal distribution. (11.570, 13.430) (11,631, 13.369)
11 To estimate the average time it takes to assemble a certain computer component, the industrial engineer at an electronic firm timed 25 technicians in the performance of this task, getting a mean of 12.5 minutes and a standard deviation of 2 minutes. Construct a 9896 confidence interval of the actual average time required to do the job assuming that the actual time follows a normal distribution. (11.570, 13.430) (11,631, 13.369)
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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Transcribed Image Text:QUESTION 11
To estimate the average time it takes to assemble a certain computer component, the industrial engineer at an electronics
firm timed 25 technicians in the performance of this task, getting a mean of 12.5 minutes and a standard deviation of 2
mìnutes. Construct a 989% confidence interval of the actual average time required to do the job assuming that the actual
time follows a normal distribution.
(11.570, 13.430)
(11.631, 13.369)
(11.503, 13.497)
(11.678, 13.322)
QUESTION 12
A manufacturer of automobile tires reported that among a shipment of 600 sent to a local distributor, 20 are slightly
blemished. If Ahmed purchases 300 of these tires at random from the distributor. On average, how many of these tires
would Ahmed expect to be blemished?
15
20
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