The Sample Size Needed to Estimate a Population Mean Within

question 141

Multiple Choice

The sample size needed to estimate a population mean within 1.5 units with a 95% confidence when the population standard deviation equals 10 is:

• A) 121
• B) 13
• C) 171
• D) 54
• E) 88

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Definitions:

Du Pont Identity Method

A technique for analyzing a company's financial performance by examining its efficiency, leverage, and profit margins.

Profit Margin

Profit Margin represents the percentage of revenue that remains after all operating expenses, interest, taxes, and preferred stock dividends have been deducted from a company's total revenue.

Total Asset Turnover

A financial ratio that measures the efficiency of a company's use of its assets to generate sales revenue.

Return On Equity

A measure of financial performance calculated by dividing net income by shareholders' equity, indicating how efficiently a company uses its equity investments to generate profit.