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

Data that is evenly distributed around the mean, creating a mirror image on either side.

Front

Bimodal

Back

A distribution with two different modes, which may appear as distinct peaks in the data.

Front

Bell-shaped

Back

A distribution that resembles the shape of a bell, often associated with the normal distribution.

Front

Skewed Left

Back

A distribution where the tail is on the left side, indicating that the mean is less than the median.

Front

Skewed Right

Back

A distribution where the tail is on the right side, indicating that the mean is greater than the median.

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.