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A sample of 150 boxes of cereal was randomly selected from the production line and found to have a mean weight of 500g and a standard deviation of 20g. A week later a sample of 120 boxes was randomly selected and, this time, the mean weight was 505g with a standard deviation of 16g. The 95% Cl for Difference, using a Two sample t test, is (-5.69, 1.69) Has the production mean shifted? No, the process has not shifted. O Yes, the process has shifted.

A sample of 150 boxes of cereal was randomly selected from the production line and found to have a mean weight of 500g and a standard deviation of 20g. A week later a sample of 120 boxes was randomly selected and, this time, the mean weight was 505g with a standard deviation of 16g. The 95% Cl for Difference, using a Two sample t test, is (-5.69, 1.69) Has the production mean shifted? No, the process has not shifted. O Yes, the process has shifted.

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 sample of 150 boxes of cereal was randomly selected from the production line and found to have a mean weight of 500g and a standard deviation of 20g. A week later a sample of 120 boxes was randomly selected and, this time, the mean weight was 505g with a standard deviation of 16g. The 95% Cl for Difference, using a Two sample t test, is (-5.69, 1.69) Has the production mean shifted? No, the process has not shifted. O Yes, the process has shifted.
Transcribed Image Text:A sample of 150 boxes of cereal was randomly selected from the production line and found to have a mean weight of 500g and a standard deviation of 20g. A week later a sample of 120 boxes was randomly selected and, this time, the mean weight was 505g with a standard deviation of 16g. The 95% Cl for Difference, using a Two sample t test, is (-5.69, 1.69) Has the production mean shifted? No, the process has not shifted. O Yes, the process has shifted.
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