Mean

The mean, also known as the average, is a measure of central tendency that represents the sum of a set of numbers divided by the number of elements in the set. It is commonly used to describe the typical value of a set of numbers.

Calculating the Mean

To calculate the mean of a set of numbers, you add up all the numbers and then divide by the total number of values. The formula for calculating the mean is:

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

Example

Let's calculate the mean for the following set of numbers: 5, 8, 12, 15, 20.

Mean (μ) = (5 + 8 + 12 + 15 + 20) / 5

Mean (μ) = 60 / 5

Mean (μ) = 12

Study Guide

1. Understand the concept of mean as a measure of central tendency.
2. Learn the formula for calculating the mean: Mean (μ) = (Sum of all values) / (Number of values).
3. Practice calculating the mean for different sets of numbers.
4. Understand how outliers can affect the mean.
5. Learn how to interpret the mean in the context of a given data set.

Remember that the mean is just one way to describe the central tendency of a set of numbers, and it's important to consider other measures of central tendency, such as the median and mode, to fully understand the distribution of the data.

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