A Random Sample of 40 Companies with Assets Over $10

question 100

Multiple Choice

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 expense among three industries rejected the null hypothesis. The mean square error (MSE) was 195. The following table summarized the results: When comparing the mean annual computer technology expense for companies in the education and tax services industries, which of the following 95% confidence interval can be constructed?

• A) 13.5 ± 2.026 * 5.78
• B) 13.5 ± 2.021 * 5.78
• C) 13.5 ± 2.026 * 13.96
• D) 13.5 ± 2.021 * 13.96

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Definitions:

Half-Life

The time required for half of the atoms in a radioactive sample to decay, transforming into different atoms or into a lower energy state.

Half-Life

The time required for a quantity to reduce to half its initial amount, commonly used in describing the decay of radioactive materials.

Half-Life

The time required for half the quantity of a radioactive substance to undergo decay, also used in broader contexts to describe any type of exponential decay.

Half-Life

The time required for one half of the atoms of a radioactive substance to disintegrate into more stable materials.