For Problems 19–24, please provide the following information.
- (a) What is the level of significance? State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test?
- (b) Check Requirements What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. Compute the z 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 a?
- (e) Interpret your conclusion in the context of the application.
21. Ecology: Hummingbirds Bill Alther is a zoologist who studies Anna’s hummingbird (Calypte anna) (Reference: Hummingbirds by K. Long and W. Alther). Suppose that in a remote part of the Grand Canyon, a random sample of six of these birds was caught, weighed, and released. The weights (in grams) were
3.7 2.9 3.8 4.2 4.8 3.1
The sample
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Chapter 8 Solutions
Understandable Statistics: Concepts and Methods
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillCollege Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning