R StatisticsLesson 32Free preview

R Mean Median Mode

This lesson is part of R · All levels

Summary

This study reviews three of the most fundamental measures of data centralization (Measures of Central Tendency): Mean (arithmetic mean), Median (middle value), and mode (most frequently occurring values). R has built-in functions mean() and median(), as well as the table() frequency table technique for finding the data mode.

Key points

The 'mean()' function calculates the arithmetic mean: the sum of the values divided by the data
The 'median()' function sorts the data and takes its middle value (resistant to outliers)
R does not have an inborn mode() function for statistics (since 'mode()' in R refers to the object data type)
The mode is calculated using a combination of the functions 'table()' and 'which.max() '

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