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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?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Evidence of Inequality:

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 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 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.
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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