The Advantage of Squaring the Deviation of Each Score from the Mean

question 62

Multiple Choice

The advantage of squaring the deviation of each score from the mean and then summing is that

• A)it makes the sample variance an unbiased estimator of the population variance
• B)it makes the degrees of freedom for sample variance equal to n - 1
• C)it produces a minimal positive solution that is not zero,so long as all scores are not exactly the same value
• D)both A and C

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Definitions:

Stock Listing

The inclusion of a company's shares on a stock exchange where they can be bought and sold by investors.

P/E

The price-to-earnings ratio, measuring a company's current share price relative to its per-share earnings.

YTD% Chg

Year-To-Date Percentage Change, a financial metric indicating the percentage change in the value of an investment since the beginning of the current calendar year.

Obligatory Sinking Fund

A financial strategy in which a company sets aside money over time to retire its debt securities or preferred stock gradually, reducing default risk.