Consider the results of the study discussed on page 417. At α = 0.05, can you support the claim that the proportion of yoga users with incomes of $20,000 to $34,999 is less than the proportion of non-yoga users with incomes of $20,000 to $34,999?
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 value and identify the rejection region.
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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