What Calculation Gives a Researcher a Good Idea of How

question 25

Multiple Choice

What calculation gives a researcher a good idea of how spread out a series of numbers is?

• A) mean
• B) median
• C) mode
• D) standard deviation
• E) correlation coefficient

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Definitions:

Equal-variances Test

A statistical test used to determine if two populations have the same variance.

Degrees of Freedom

The count of unique values or quantities that can be allocated to a statistical distribution or a system while still adhering to given constraints.

Normal Populations

A population distribution that follows a normal (Gaussian) curve, where most observations cluster around the mean, and probabilities for values can be calculated using the curve.

Independent Sample

A sample that is selected from a population in such a way that the entities are not related or do not affect each other.