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Consider the results of the study discussed on page 417. At α = 0.05, can you support the claim that there is a difference between the proportion of yoga users who are 40- to 49-year-olds and the proportion of non-yoga users who are 40- to 49-year-olds?
a. Find and .
b. Verify that n1, n1, n2, and n2 are at least 5.
c. Identify the claim and state H0 and Ha.
d. Identify the level of significance α.
e. Find the critical values and identify the rejection regions.
f. Find the standardized test statistic z. Sketch a graph.
g. Decide whether to reject the null hypothesis.
h. Interpret the decision in the context of the original claim. |
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