The mean, also known as the average, is a measure of central tendency. It is calculated by adding up all the values in a set of numbers and then dividing by the total number of values.

To calculate the mean of a set of numbers:

- Add up all the values in the set
- Count the total number of values in the set
- Divide the sum by the total number of values

Let's calculate the mean of the following set of numbers: 5, 7, 11, 15, 21.

Step 1: Add up all the values: 5 + 7 + 11 + 15 + 21 = 59

Step 2: Count the total number of values: 5

Step 3: Divide the sum by the total number of values: 59 / 5 = 11.8

So, the mean of the set is 11.8

- Practice calculating the mean of different sets of numbers
- Understand the concept of central tendency and how the mean represents it
- Review real-life examples of when the mean is used, such as in sports statistics or financial reports

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

Knowledge of Statistics: Students will collect, organize, display, analyze, or interpret data to make decisions or predictions.

Data Analysis: Describe a set of data.

Determine median, mode, and range (Assessment limit: Use no more than 8 pieces of data and whole numbers (0 - 100)).

Model the mean of a set of data.