A1 Unit 1 Flashcards

Front

Standard Deviation

Back

A measure of the amount of variation of a data set in relation to the mean.

A larger standard deviation suggests more variation.

Front

Mean

Back

The average of a set of numbers. To find the mean we add up all the numbers in a data set and divide by the number of numbers.

Front

Median

Back

The middle value in a list of numbers, which separates the higher half from the lower half.

The data set must be in order first!

Front

Symmetric Data

Back

Front

Bimodal

Back

Front

Bell-shaped

Back

Front

Skewed Left

Back

Front

Skewed Right

Back

Front

Measures of Center

Back

Statistical measures that describe the center of a data set, such as mean, median, and mode.

Front

Measures of Spread

Back

Statistical measures that describe the variability or consistency in a data set, such as range, IQR, and standard deviation.