## What is Mean?

In mathematics, the mean is a measure of central tendency that represents the average of a set of numbers. It is calculated by adding up all the numbers in a set and then dividing the sum by the total number of values in the set.

## Calculating the Mean

To calculate the mean, you need to add up all the numbers in the set and then divide by the total number of values. For example, if you have a set of numbers: 5, 8, 10, 12, 15, the mean would be calculated as (5+8+10+12+15) / 5 = 10.

## Importance of Mean

The mean is an important statistical measure that helps in understanding the typical value of a data set. It is widely used in various fields such as economics, science, and business to analyze and interpret data.

## Examples of Mean in Action

**Example 1:**In a class of 30 students, the average score on a test was 85. The mean score is calculated by adding up all the individual scores and dividing by 30.**Example 2:**A company wants to determine the average salary of its employees. By finding the mean salary, the company can get an idea of the typical earnings of its staff.

## Case Study: Mean in Real Life

A pharmaceutical company wants to analyze the effectiveness of a new drug. They conduct a clinical trial with 100 participants and measure the improvement in their symptoms. By calculating the mean improvement, the company can determine the overall impact of the drug.

## Statistics on Mean

In a survey of 500 respondents, the average age was found to be 35 years. This mean age provides a snapshot of the demographic profile of the survey participants.