What is Mean, Median, and Mode

Learn about the key statistical measures of mean, median, and mode and how they provide insights into data distribution. Explore examples and case studies to understand their importance in decision-making.

Mean, Median, and Mode Explained

Mean, median, and mode are commonly used statistical measures to describe the central tendency of a set of data. Each measure serves a distinct purpose and provides valuable insights into the distribution of the data.


The mean, also known as the average, is calculated by adding up all the values in a data set and then dividing by the total number of values. It is a useful measure for determining the typical value of a set of data.

  • Example: Consider a set of numbers (2, 4, 6, 8, 10). The mean of this data set would be (2+4+6+8+10)/5 = 6.


The median is the middle value in a sorted data set. To find the median, the data must first be arranged in ascending or descending order. If there is an odd number of values, the median is the middle value. If there is an even number of values, the median is the average of the two middle values.

  • Example: Consider a set of numbers (4, 7, 10, 12, 15, 22). The median of this data set would be 10.


The mode is the value that appears most frequently in a data set. A data set can have multiple modes, one mode, or no mode at all. The mode is useful for identifying the most common value or category in a data set.

  • Example: Consider a set of numbers (4, 7, 7, 10, 12, 15). The mode of this data set would be 7.

Importance of Mean, Median, and Mode

These measures are essential tools for summarizing and interpreting data. They provide valuable insights into the distribution, central tendency, and variability of a data set. By using mean, median, and mode, researchers and analysts can make informed decisions based on statistical evidence.

Case Study

In a survey of 100 customers, a company wants to determine the average age of its customers (mean), the age group that represents the majority of its customers (mode), and the middle age of its customers (median). By calculating the mean, median, and mode of the customers’ ages, the company can tailor its products and services to better meet the needs of its target demographic.

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