When working with the mean of a set of numbers, then you are wanting the average number. This means that your mean should not be greater than your highest value or lower than your smallest number. Remember, finding the mean has two steps: first step, add all of your numbers together; second step, divide the sum that you found by how many numbers are in your set of data.
For example,
George bought a candy bar for $1.50, twizzlers for $3.50, a coke for $0.75, a toy for $2.50, and a ruler for $0.75. What is the average amount he spent at the store?
Well, we know that average is the same as mean, so my first thing will be to add all of my prices together and the total George spent was $11.00.
The next step is to divide the total by how many numbers are in my set of data and George bought 5 items, so there are 5 numbers in my set of data.
The average amount that George spent at the store can be found by dividing $11 by 5 and the answer is $2.20.
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