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www.purplemath.com/modules/meanmode.htm

Purplemath. Mean, median, and mode are three kinds of "averages". There are many "averages" in statistics, but these are, I think, the three most common, and are certainly the three you are most likely to encounter in your pre-statistics courses, if the topic comes up at all.

www.thoughtco.com/the-mean-median-and-mode-2312604

Before you can begin to understand statistics, you need to understand mean, median, and mode.Without these three methods of calculation, it would be impossible to interpret much of the data we use in daily life.

www.mathsisfun.com/definitions/mean.html

The Arithmetic Mean is the average of the numbers: a calculated "central" value of a set of numbers. To calculate it: • add up all the numbers, • then divide by how many numbers there are. Example: what is the mean of 2, 7 and 9? Add the numbers: 2 + 7 + 9 = 18

www.mathsisfun.com/mean

The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count .

www.mathsisfun.com/definitions/sum.html

The result of adding two or more numbers. Example: 9 is the sum of 2, 4 and 3 (because 2 + 4 + 3 = 9). Drag the numerals to the two blue boxes to sum them:

www.ducksters.com/kidsmath/mean_median_mode_range.php

The term "average" is used a lot with data sets. Mean, median, and mode are all types of averages. Together with range, they help describe the data. Definitions: Mean - When people say "average" they usually are talking about the mean. You can figure out the mean by adding up all the numbers in the data and then dividing by the number of numbers.

www.mathsisfun.com/algebra/logarithms.html

So, be careful when you read "log" that you know what base they mean! Logarithms Can Have Decimals. All of our examples have used whole number logarithms (like 2 or 3), but logarithms can have decimal values like 2.5, or 6.081, etc.

www.quora.com/What-does-sum-mean-in-math-classes

What is a sum? We explain what a sum is and how children are taught to understand the term when it appears in mental maths tests, word problems or investigations. What is a sum? The sum of two numbers is the answer you get when you add them both t...

www.britannica.com/science/mean

Mean, in mathematics, a quantity that has a value intermediate between those of the extreme members of some set. Several kinds of mean exist, and the method of calculating a mean depends upon the relationship known or assumed to govern the other members. The arithmetic mean, denoted x, of a set of