Concept explainers
Please provide the following information for Problems 11–22.
- (a) What is the level of significance? State the null and alternate hypotheses.
- (b) Check Requirements What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. Compute the appropriate sampling distribution value of the sample test statistic.
- (c) Find (or estimate) the P-value. Sketch the sampling distribution and show the area corresponding to the P-value.
- (d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis? Are the data statistically significant at level α?
- (e) Interpret your conclusion in the context of the application.
Note: For degrees of freedom d.f. not given in the Student’s t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more “conservative” answer.
13. Wildlife: Coyotes A random sample of 46 adult coyotes in a region of northern Minnesota showed the average age to be
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