Concept explainers
Hypothesis Testing Using a P-Value In Exercises 31–36,
- (a) identify the claim and state H0 and Ha.
- (b) find the standardized test statistic z.
- (c) find the corresponding P-value.
- (d) decide whether to reject or fail to reject the null hypothesis.
- (e) interpret the decision in the context of the original claim.
32. Sprinkler Systems A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is at least 135°F. To test this claim, you randomly select a sample of 32 systems and find the
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