Statistics Calculator

Compute Mean, Median, Mode, SD & Variance.

Enter Data Set

Accepts commas, spaces, or new lines.

Data Count: 0

Sorted: -

Measures of Central Tendency

Mean (Average)

Median (Middle)

Mode (Frequent)

Measures of Dispersion

Standard Deviation (Sample)

Var: -

Standard Deviation (Pop.)

Var: -

Range (Max - Min)

Sum

Quartiles

Q1 (25%)

Q2 (Median)

Q3 (75%)

Interquartile Range (IQR)

Frequency Distribution (Histogram)

Understanding Basic Statistics

Statistics helps us understand data. This calculator provides the most common measures:

Mean vs. Median

Mean (Average): The sum of all values divided by the number of values. It considers every data point.
Median (Middle Value): The middle number when data is sorted. Use this when your data has outliers (extreme values) as the mean can be skewed.

What is Standard Deviation?

Standard Deviation (SD) measures how spread out your data is from the mean.

Low SD: Data points are clustered close to the average.
High SD: Data points are spread out over a wide range.

Sample vs. Population: Use "Population SD" if you have data for the entire group. Use "Sample SD" if you only have a subset of data representing a larger group.

Quartiles & IQR

Quartiles divide your data into four equal parts.
IQR (Interquartile Range): The difference between Q3 (75th percentile) and Q1 (25th percentile). It shows where the "middle 50%" of your data lies, ignoring extremes.