Question

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 100 from each manufacturer. The numbers of acceptable and unacceptable bulbs from each manufacturer are shown below. At the 0.01 significance level, is there a difference in the quality of the bulbs? (Round your answers to 3 decimal places.)

Manufacturer A B C D

Unacceptable 7 7 6 17

Acceptable 93 93 94 83

Total 100 100 100 100

H0: There is no relationship between quality and manufacturer.

H1: There is a relationship.

1) Reject H0 if X² > _________

2) X² = __________

3) Reject/Do not Reject Ho. There is Sufficient/Insufficient evidence to indicate that there is a relationship between quality and manufacturer.

Answer 1