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Four brands of lightbulbs are being considered for use in the final assembly area of the...

Four brands of lightbulbs are being considered for use in the final assembly area of the Ford F-150 truck plant in Dearborn, Michigan. The director of purchasing asked for samples of 160 from each manufacturer. The numbers of acceptable and unacceptable bulbs from each manufacturer are shown below. At the 0.05 significance level, is there a difference in the quality of the bulbs? Manufacturer A B C D Unacceptable 11 24 17 33 Acceptable 149 136 143 127 Total 160 160 160 160 Click here for the Excel Data File H0: There is no relationship between quality and manufacturer. H1: There is a relationship. State the decision rule using 0.05 significance level. (Round your answer to 3 decimal places.) Compute the value of chi-square. (Round your answer to 3 decimal places.) What is your decision regarding H0?

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