Statistics
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Boundless Statistics
Frequency Distributions
Statistics Textbooks Boundless Statistics Frequency Distributions
Statistics Textbooks Boundless Statistics
Statistics Textbooks
Statistics

Section 1

Frequency Distributions for Quantitative Data

Book Version 1
By Boundless
Boundless Statistics
Statistics
by Boundless
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7 concepts
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Guidelines for Plotting Frequency Distributions

The frequency distribution of events is the number of times each event occurred in an experiment or study.

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Outliers

In statistics, an outlier is an observation that is numerically distant from the rest of the data.

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Relative Frequency Distributions

A relative frequency is the fraction or proportion of times a value occurs in a data set.

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Cumulative Frequency Distributions

A cumulative frequency distribution displays a running total of all the preceding frequencies in a frequency distribution.

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Graphs for Quantitative Data

A plot is a graphical technique for representing a data set, usually as a graph showing the relationship between two or more variables.

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Typical Shapes

Distributions can be symmetrical or asymmetrical depending on how the data falls.

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Z-Scores and Location in a Distribution

A $z$-score is the signed number of standard deviations an observation is above the mean of a distribution.

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