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
Use the traditional method of hypothesis testing unless otherwise specified.
10. Healthy Eating Americans appear to be eating healthier. Between 1970 and 2013 the per capita consumption of broccoli increased 1200.5% from 0.5 to 6.4 pounds. A nutritionist followed a group of people randomly assigned to one of three groups and noted their monthly broccoli intake (in pounds). At a = 0.05, is there a difference in means?
Group A | Group B | Group C |
2.0 | 2.0 | 3.7 |
1.5 | 1.5 | 2.5 |
0.75 | 4.0 | 4.0 |
1.0 | 3.0 | 5.1 |
1.3 | 2.5 | 3.S |
3.0 | 2.0 | 2.9 |
Source: World Almanac.
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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,