Measures of Central Tendency

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What is the mean in statistics?

Back

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

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What is the median in statistics?

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The median is the middle value in a data set when the numbers are arranged in order. If there is an even number of values, the median is the average of the two middle numbers.

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What is the mode in statistics?

Back

The mode is the value that appears most frequently in a data set.

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What is an outlier?

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An outlier is a data point that differs significantly from other observations in a data set, often due to variability in the measurement or it may indicate a measurement error.

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How does an outlier affect the mean?

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An outlier can significantly affect the mean, making it higher or lower than the central tendency of the rest of the data.

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How does an outlier affect the median?

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The median is less affected by outliers because it is based on the middle value of a data set.

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What is the range in statistics?

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The range is the difference between the highest and lowest values in a data set.

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When is the mean the most appropriate measure of central tendency?

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The mean is most appropriate when the data is symmetrically distributed without outliers.

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When is the median the most appropriate measure of central tendency?

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The median is most appropriate when the data set contains outliers or is skewed.

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What is the formula for calculating the mean?

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Mean = (Sum of all values) / (Number of values)