Mean (Average)

beginnerstatisticsdescriptive

Calculates the average of a dataset

The Formula

μ = (Σx) / n

Variables & Symbols

μ

Mean

Σx

Sum of all values

n

Number of values

When to Use This Formula

  • Finding average
  • Descriptive statistics
  • Data analysis

Worked Examples

Example 1

Problem:

Find mean of {2, 4, 6, 8, 10}

Solution: μ = 6

Step-by-Step:

1

Sum: 2+4+6+8+10 = 30

2

Count: n = 5

3

Mean: 30/5 = 6

Common Mistakes to Avoid

  • Counting wrong number of values
  • Arithmetic errors

Real-World Applications

1

Test score averages

2

Business analytics

3

Scientific research

Practice Problems

Problem 1: Mean of {3,6,9,12}

Show Answer

Answer: 7.5

Related Formulas

median formula

View Formula →

mode formula

View Formula →

standard deviation

View Formula →

Tags:

statisticsmeanaverage

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