Unit 1 Vocabulary Flash Cards

Front

Standard Deviation

Back

A measure of the amount of variation or dispersion in a set of values.

Front

Empirical Rule

Back

A statistical rule stating that for a normal distribution, nearly all data will fall within three standard deviations of the mean.

Front

Normal Distribution

Back

A probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Front

Z-Score

Back

A statistical measurement that describes a value's relation to the mean of a group of values, measured in terms of standard deviations from the mean.

Front

Mean

Back

The average of a set of numbers, calculated by dividing the sum of all values by the number of values.

Front

Bell Curve

Back

The graphical representation of a normal distribution, characterized by its bell-shaped curve.

Front

68-95-99.7 Rule

Back

A shorthand used to remember the percentage of values that lie within one, two, and three standard deviations of the mean in a normal distribution.

Front

Skewness

Back

A measure of the asymmetry of the probability distribution of a real-valued random variable about its mean.

Front

Outlier

Back

An observation point that is distant from other observations in the data set, often due to variability in measurement or experimental errors.

Front

Percentile

Back

A value below which a given percentage of observations in a group of observations falls.