Statistics Calculator
Calculate key statistical measures from your dataset. Enter numbers separated by commas, spaces, or new lines.
Understanding Statistical Measures
Basic Measures
Mean, median, and mode are the three main measures of central tendency:
- Mean - The average of all values (sum divided by count)
- Median - The middle value when data is ordered
- Mode - The most frequently occurring value
Spread Measures
These measures help understand how spread out your data is:
- Range - The difference between the largest and smallest values
- Standard Deviation - Measures how spread out numbers are from the mean
- Variance - The square of standard deviation
- IQR (Interquartile Range) - The range between the first (Q1) and third (Q3) quartiles
Population vs Sample Standard Deviation
When to use which:
- Population (σ) - Use when you have data for an entire population
- Sample (s) - Use when you have data for only a sample of the population