Electric motors are assembled on four different production l

Electric motors are assembled on four different production lines. Random samples of motors are taken from each line and inspected. The numbers that pass and that fail the inspection are counted for each line, with the following results: Proudct Line 1 2 3 4 Pass 482 467 458 404 Fail 57 59 37 47 State the appropriate null hypothesis. Compute the expected values under the null hypothesis (put these in a table). Compute the value of the chi-square statistic. Find the p-value. Can you conclude that the failure rates differ among the four lines?

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