When a Standard Deviation Is Calculated from Sample Data,the Denominator

question 12

Multiple Choice

When a standard deviation is calculated from sample data,the denominator in the formula SHOULD be ______.

• A)the sum of all values of Y
• B)the mean of Y
• C)N
• D)N − 1

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Definitions:

Possibility of Error

The probability that a statistical inference or decision made might be incorrect due to the limitations of sampling or experimental design.

Statistical Significance

The probability that an observed difference or relationship exists in a population, not just in the sample studied.

Hypothesized Reason

A suggested theory developed from minimal evidence intended to serve as a foundation for additional research.

Statistical Significance

A determination that a relationship between variables is not likely to be due to chance at a specified level of probability.