Question: A quality control engineer wants to compare the production proccess parts manufactured by four different companies, The engineer randomly selects samples totaling 270 parts from

A quality control engineer wants to compare the production proccess parts manufactured by four different companies, The engineer randomly selects samples totaling 270 parts from the four companies and summarizes the results in the following table. Based upon the results of the samples, can the engineer conclude that part quality and manufacturer are independent at a signifance level of 1%? (Chart will be typed below)

Companies

Port Quality- A, B, C, D

Defective- 8. 8, 10, 9

Non defective 60, 65, 60, 50

A. Formulate the hypotheses

B. State the decision rule (diagram)

C. Calculate the Chi-square test statistic

D. Determine the conclusion and answer the question.

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