significance level. (Round your answer to 3 decimal places.) b. Compute the value of chi-square. (Round your answer to 3 decimal places.) c. What is your decision regarding H0?
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 120 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?
| Manufacturer | ||||||
| A | B | C | D | |||
| Unacceptable | 11 | 9 | 6 | 9 | ||
| Acceptable | 109 | 111 | 114 | 111 | ||
| Total | 120 | 120 | 120 | 120 | ||
H0: There is no relationship between quality and manufacturer.
H1: There is a relationship between quality and manufacturer.
a. State the decision rule using 0.01 significance level. (Round your answer to 3 decimal places.)
b. Compute the value of chi-square. (Round your answer to 3 decimal places.)
c. What is your decision regarding H0?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
