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Question 11D

1. What are the null and alternative hypotheses?

Null Hypothesis: Volume has no relation to defect rate (the slope is equal to 0).

Alternative Hypothesis: As volume increase, defect rate increases. (the slope is not equal to 0).

2. What is the population of interest? What is the sample?

All shifts at the plant in question make up the population of interest.

160 randomly selected shifts make up the sample.

3. On the basis of the output, what can you conclude about the null hypothesis?

The null hypothesis can be rejected. There is a significant linear regression between volume and defect rate and the slope is not equal to 0.

4. Can you reject the null hypothesis that the slope is 0?

Yes. The scatter plot shows a linear relationship and the regression coefficient is .740. The value of t is 13.846, indicating that the slope is...
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