At an assembly plant for light trucks, routine monitoring of the quality of welds yields the following
Question:
Can you conclude that the quality varies among shifts?
a. State the appropriate null hypothesis.
b. Compute the expected values under the null hypothesis.
c. Compute the value of the chi-square statistic.
d. Find the P-value. What do you conclude?
Transcribed Image Text:
Number of Welds High Quality Quality Moderate Low Quality Day Shift Evening Shift Night Shift 467 191 42 445 171 34 254 129 17
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