Concept explainers
For Exercises 7 through 20, assume that all variables are
a. State the hypotheses and identify the claim.
b. Find the critical value.
c. Compute the test value.
d. Make the decision.
e. Summarize the results, and explain where the differences in the means are.
Use the traditional method of hypothesis testing unless otherwise specified.
16. Annual Child Care Costs Annual child care costs for infants are considerably higher than for older children. At a = 0.05, can you conclude a difference in
New England | Midwest | Southwest |
10.390 | 9.449 | 7.644 |
7.592 | 6.985 | 9.691 |
8.755 | 6.677 | 5.996 |
9.464 | 5.400 | 5.386 |
7.328 | 8.372 |
Source: www.naccrra.org (National Allocation of Child Care Resources and Referral Agencies: “Breaking the Piggy Bank”)
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Elementary Statistics: A Step By Step Approach
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillCalculus For The Life SciencesCalculusISBN:9780321964038Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.Publisher:Pearson Addison Wesley,