Concept explainers
Performing a Kruskal-Wallis Test In Exercises 3β6, (a) identify the claim and state H0 and Ha. (b) find the critical value and identify the rejection region, (c) find the test statistic H, (d) decide whether to reject or fail to reject the null hypothesis, and (e) interpret the decision in the context of the original claim.
4. Hourly Rates A researcher wants to determine whether there is a difference in the hourly pay rates for registered nurses in Indiana, Kentucky, and Ohio. The researcher randomly selects several registered nurses in each state and records the hourly pay rate for each. The table shows the results. At a = 0.05, can the researcher conclude that the distribution of the hourly pay rates of registered nurses in at least one state is different from the others? (Adapted from U.S. Bureau of Labor Statistics)
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Elementary Statistics: Picturing the World (7th Edition)
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