Clinical Research Glossary

mean mean


The average.

Example of mean in a sentence

In math, the mean is the average value of a set of numbers.

More Info

The mean is calculated by adding all the numbers in a set together, and dividing by the number of values.

For example, in a group of four people who are aged 10, 20, 30, and 40, the mean (or average) age of the group members is 25.

This is calculated by first adding all four numbers together, and then dividing by 4.

So, 10 + 20 + 30 + 40 = 100. And 100/4 = 25. Thus, the mean, or average age, is 25.

Other info to think about when joining a study

You may see the term “mean” used to describe an average of all the study data using numbers. You may see this term used in study results reports.

If you receive study results that report the mean of any data and you have questions about that information, you can reach out to the study team to learn more.

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