Mean Calculator Formula
Understand the math behind the mean calculator. Each variable explained with a worked example.
Formulas Used
Mean
mean = (a + b + c + d) / 4Sum
sum = a + b + c + dRange
range = max(max(a, b), max(c, d)) - min(min(a, b), min(c, d))Variables
| Variable | Description | Default |
|---|---|---|
a | Value 1 | 12 |
b | Value 2 | 18 |
c | Value 3 | 24 |
d | Value 4 | 30 |
mean_val | Derived value= (a + b + c + d) / 4 | calculated |
How It Works
How to Calculate the Mean
Formula
Mean = (x₁ + x₂ + x₃ + ... + xₙ) / n
The arithmetic mean is the most common type of average. Add all values together and divide by the number of values.
Worked Example
Find the mean of 12, 18, 24, and 30.
- 01Sum = 12 + 18 + 24 + 30 = 84
- 02Count = 4
- 03Mean = 84 / 4 = 21
Frequently Asked Questions
What is the mean?
The mean (arithmetic mean) is the sum of all values divided by the number of values. It is the most commonly used measure of central tendency.
Is the mean the same as the average?
Yes, in everyday usage, "average" typically refers to the arithmetic mean. However, "average" can also refer to the median or mode in certain contexts.
Learn More
Guide
Understanding Standard Deviation - Complete Guide
Learn what standard deviation is, how to calculate it step by step, and why it matters. Covers population vs. sample standard deviation with clear examples.
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