MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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A random sample of 40 companies with assets over $10 million was surveyed and asked to indicate their industry and annual computer technology expense. The ANOVA comparing the average computer technology expenses among three industries rejected the null hypothesis. The
| Education | Tax Services | Food Services | |
|---|---|---|---|
| Number Sampled | 10 | 14 | 16 |
| Mean Expense (1,000,000s) | 18 | 47.5 | 52 |
When comparing the mean annual computer technology expenses for companies in the tax services and education industries, which of the following 95% confidence intervals can be constructed?
Multiple Choice
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29.5 ± 2.026 × 6.014
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29.5 ± 2.021 × 6.014
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29.5 ± 2.026 × 29.96
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29.5 ± 2.021 × 29.9
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