Statistical Concepts

Front

Mean

Back

The mean is the average of a set of numbers, calculated by adding all the numbers and dividing by the number of addends.

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Median

Back

The median is the middle number of a set of numbers listed in numerical order. If the set has an even number of values, the median is the average of the two middle numbers.

Front

Mode

Back

The mode is the number that appears most often in a set of numbers. A set can have no mode, one mode, or more than one mode.

Front

Range

Back

The range of a set of numbers is the difference between the largest and smallest number in the set.

Front

Outlier

Back

An outlier is an extreme value in a set of numbers, much larger or smaller than the others, which can skew the data.

Front

Stem-and-Leaf Plots

Back

A stem-and-leaf plot summarizes the shape of a set of data, arranged by place value, with two columns separated by a vertical line.

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Frequency Diagrams

Back

Frequency diagrams consist of a number line plotting the range of possible values, with an 'x' representing each member of the population.

Front

Box-and-Whisker Plots

Back

Box-and-whisker plots are used to analyze data variation, dividing data into four quartiles. The box represents the middle 50% of the data.

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Bar Graphs

Back

Bar graphs compare the amounts or frequency of different data characteristics, with important parts like the graph title, axes labels, and scale.

Front

Scatterplots

Back

Scatterplots show the relationship between two data sets, with data points plotted as ordered pairs, indicating positive, negative, or no correlation.