An Analysis of Variance Is Used to Evaluate the Mean

question 14

Multiple Choice

An analysis of variance is used to evaluate the mean differences for a research study comparing four treatments with a separate sample of n = 8 in each treatment.If the data produce an F-ratio of F = 5.50, then which of the following is the correct statistical decision?

• A)Reject the null hypothesis with α = .05 but not with α = .01.
• B)Reject the null hypothesis with either α = .05 or α = .01.
• C)Fail to reject the null hypothesis with either α = .05 or α = .01.
• D)There is not enough information to make a statistical decision.

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Definitions:

Operating Income

This is the profit realized from a business's operations, calculated by subtracting operating expenses from gross profit.

Total Contribution Margin

The difference between total sales revenue and total variable costs, indicating the amount available to cover fixed expenses and generate profit.

Operating Leverage

A measure of how sensitive net operating income is to a given percentage change in revenue, indicating the proportion of fixed versus variable costs.

Income Statement

A financial report that shows a company's revenues, expenses, and profit or loss over a specific period.