The Standard Deviation

question 62

Multiple Choice

The standard deviation

• A) indicates the average difference between each score in a group and the mean for that group of scores.
• B) reveals the degree of skew for a group of scores.
• C) is sensitive to scores at the extremes of a distribution of scores.
• D) is used to determine whether a data set is positively or negatively skewed.

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Definitions:

More Than Two Categories

Refers to situations or conditions where a variable or outcome can fall into more than two distinct groups or classifications.

Z-test

A statistical test used to determine if there is a significant difference between sample and population means, assuming the population variance is known.

Chi-squared Test

The Chi-squared test is a statistical method used to determine if there is a significant difference between the expected and observed frequencies in one or more categories.

Test Statistic

A quantity derived from sample data used to make a decision about a hypothesis test.