What is the difference between Mean and Median?

The Mean is the arithmetic average of all numbers. The Median is the middle value when the data is sorted. The Median is often better for skewed data (like salaries) as it isn't affected by outliers.

How do you calculate Standard Deviation?

Find the mean, subtract the mean from each number and square the result, find the average of those squared differences (variance), and take the square root.

A Z-score tells you how many standard deviations a specific data point is from the mean. A Z-score of 0 is exactly on the mean.

Statistics Calculator

Calculate Mean, Median, Mode, Standard Deviation, and Z-Scores from a list of numbers.

Quick Summary: Statistics Calculator

A statistics calculator computes central tendency (mean, median, mode) and dispersion (variance, standard deviation) for a dataset. Standard deviation measures how spread out the numbers are from the mean.

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