Chi-square test for independence of attributes

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Reference no: EM1317411

To test the hypothesis based on Chi-square test for independence of attributes.

At a large commercial bakery, one of the measures familiar with evaluate employees is the number of broken cookies per 1000 produced. The quality control department wants to determine if there is a relationship between years of experience and broken cookie rate.

Assume the job is repetitious, so after training, any improvement because of continued learning is likely offset by decreased motivation.

The broken cookie rates are calculated daily. The results for 100 workers are given below:

		Years Since Training Period
		<1 Year	1-4 Years	>4 Years
		Group 1	Group 2	Group 3	Total
Broken Cookie Rate	High	6	9	9	24
	Average	9	19	23	51
	Low	7	8	10	25
	Total	22	36	42	100

Formally test the null hypothesis using the chi-squared method with α=0.05.

What is your decision?

1. Reject the null hypothesis of equal broken cookie rates.

2. Fail to reject the null hypothesis of equal broken cookie rates.

Reference no: EM1317411

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