If the Standard Deviation of a Population Is 70 and We

question 34

Multiple Choice

If the standard deviation of a population is 70 and we want the standard error (the standard deviation of the sample mean) to be 14, then we need to take

• A) 5 samples
• B) 25 samples
• C) 125 samples
• D) 625 samples

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Definitions:

Profit Margin

The ratio of a company's net income to its revenue, indicating the percentage of profit made from sales.

Operating Expenses

Expenses incurred through normal business operations, such as rent, utilities, and payroll.

Cost Of Goods Sold

The direct costs attributable to the production of the goods sold by a company, including material and labor costs.

Return On Investment

A metric used to evaluate the efficiency of an investment, calculated as the profit from an investment relative to its cost.