A plant manager wants to see if there are different proportions of defective items among the four machines at her automotive plant. She randomly selects 100 automobile parts from each of the four machines, as shown in the table below: Machine A B C D Number of Defective Parts 58 55 51 66 Is there appropriate evidence the machines are not equal concerning proportions of defective products?
A plant manager wants to see if there are different proportions of defective items among the four machines at her automotive plant. She randomly selects 100 automobile parts from each of the four machines, as shown in the table below: Machine A B C D Number of Defective Parts 58 55 51 66 Is there appropriate evidence the machines are not equal concerning proportions of defective products?
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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Evidence of Inequality:
Transcribed Image Text:A plant manager wants to see if there are different proportions of defective items among the four machines at her
automotive plant.
She randomly selects 100 automobile parts from each of the four machines, as shown in the table below:
Machine
A B
C
D
Number of Defective Parts
58
55
51
66
Is there appropriate evidence the machines are not equal concerning proportions of defective products?
Transcribed Image Text:A
Yes, at the 1%, 5%, and 10% alpha levels.
B
Yes, at the 5% and 10% alpha levels, but not at the 1% level.
C
Yes, at the 10% alpha level, but not the 1% or 5% levels.
D
No, not at any of the common alpha levels of 1%, 5%, or 10%.
No, in fact there is strong evidence the machines are all equally accurate concerning proportions of
E
defective products.
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