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When determining the sample size needed to achieve a particular error estimate you need to know σ. What are
two methods of estimating σ if σ is unknown?
Computation
The process of performing mathematical calculations or processing information to achieve a result.
Debt-equity Ratio
A metric that evaluates the financial leverage of a company, determined by dividing the total amount of its liabilities by its shareholder equity.
Weighted Average Cost
A financial metric that calculates the average price of various sources of capital (debt, equity, etc.), weighted by their respective use in the financing mix of a company.
Cost of Equity
The return a company requires to decide if an investment meets capital return requirements, often calculated using models like the Capital Asset Pricing Model (CAPM).
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