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The average in math is a calculated central value of a set of numbers, like the middle number in a group. To calculate it add up all the numbers, then divide by the total amount of numbers.

A normal distribution is a type of pattern that we often see in data and information. Imagine that you have a bag with a large number of marbles. A normal distribution can be used to describe many different kinds of data, such as heights, weights, IQ scores, and many others. Understanding normal distributions is important in many fields, including science, medicine, and statistics. It can help us make predictions and make sense of data that we collect.

The weighted average is a way to find the average height of the group, taking into account that some children are taller than others. The result is the weighted average height of the group of children in your class. This way, the taller children have more influence on the average height, and the shorter children have less influence.