Statistics - Chi-Squared Test for independence
Not what you're looking for?
Question :
A quality control engineer wants to compare the production process of parts manufactured by four different companies. The engineer randomly samples a total of 270 parts from the four companies and summarizes the results in the following table. Based upon the results of the sample, can the quality control engineer conclude that part quality and manufacturer are independent at level of significance of 1%
Part Quality Co. A Co. B Co. C Co. D Row Total
Defective 8 8 10 9
Non-Defective 60 65 60 50
Column Total
a) Formulate the hypothesis
b) State the decision rule
c) Calculate Chi-Square statistic
d) Determine the conclusion and answer the question
For the full description of the question, please see the attached question file.
Thank you
Purchase this Solution
Solution Summary
In the solution for the posted problem on Chi-Squared Test for testing the Relationship between attributes( Test of Independence), the solution to the posted problem is given with step by step working and simplification in such a way that the student could easily understand the solution procedure and could use the solution of this problem as a model solution to solve other similar problems.
Solution Preview
Null Hypothesis :
H0 : part quality and manufacturer are independent of each other
Alternate Hypothesis:
H1 ...
Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.