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?
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?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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Question
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 mean square error (MSE) was 211. The following table summarizes the results:
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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