Take this quiz as you would take a quiz in class. After you are done, check your work against the answers given in the hack of the hook.
In each exercise,
- (a) identify the claim and state H0 and Ha,
- (b) find the critical value and identify the rejection region,
- (c) find the test statistic,
- (d) decide whether to reject or fail to reject the null hypothesis, and
- (e) interpret the decision in the context of the original claim.
In Exercises 3 and 4, use the data, which list the annual wages (in thousands of dollars) for randomly selected individuals from three metropolitan areas. Assume the wages are
Ithaca. NY: 44.2, 51.5, 25.8, 28.3, 37.8, 38.0, 32.6, 41.8, 42.0, 40.6, 26.2, 27.9, 48.3
Little Rock. AR: 45.1, 38.1, 47.8, 34.4, 39.6, 47.1, 29.6, 54.8, 34.4, 40.3, 40.1, 41.7, 40.9, 38.9, 25.9
Madison, WI: 50.3, 41.8, 55.5, 40.8, 55.6, 38.6, 50.0, 46.8, 49.0, 52.9, 48.3, 47.5, 39.2, 32.7, 54.1
3. At α = 0.01, is there enough evidence to conclude that the variances of the annual wages for Ithaca, NY, and Little Rock, AR, are different?
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Elementary Statistics: Picturing the World (7th Edition)
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