What is the difference between mean and median?

Mean is the arithmetic average (sum ÷ count). Median is the middle value when sorted. Median is less affected by outliers and is often a better measure of "typical" for skewed data.

Mode is the most frequently occurring value in a dataset. A dataset can have no mode, one mode (unimodal), or multiple modes (bimodal, multimodal).

What is standard deviation?

Standard deviation measures how spread out the data is from the mean. A low standard deviation means data points cluster near the mean; high means they are spread out.

Population vs sample standard deviation?

Population standard deviation divides by n, sample divides by (n-1) for an unbiased estimate. This calculator uses population statistics. For samples, multiply variance by n/(n-1).

What is the difference between mean and median?

Mean is the arithmetic average (sum ÷ count). Median is the middle value when sorted. Median is less affected by outliers and is often a better measure of "typical" for skewed data.

Mode is the most frequently occurring value in a dataset. A dataset can have no mode, one mode (unimodal), or multiple modes (bimodal, multimodal).

What is standard deviation?

Standard deviation measures how spread out the data is from the mean. A low standard deviation means data points cluster near the mean; high means they are spread out.

Population vs sample standard deviation?

Population standard deviation divides by n, sample divides by (n-1) for an unbiased estimate. This calculator uses population statistics. For samples, multiply variance by n/(n-1).

Educational Tool — Estimates for educational purposes only. Not financial advice.Disclaimer

Understanding your data starts with descriptive statistics. This calculator computes all the key measures of central tendency (mean, median, mode) and dispersion (range, variance, standard deviation) for any dataset.

Statistics Calculator

Calculate mean, median, mode, range, variance, and standard deviation for any dataset.

January 2026

Data (comma-separated)

Enter numbers separated by commas, e.g.: 5, 10, 15, 20, 25

Your Results

Count

Mean (Average)

17.5

Median

17.5

Mode

No mode

Range

Variance

72.92

Standard Deviation

8.54

Sum

105

Minimum

Maximum

Wally's Analysis

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AI Disclosure

Wally's Analysis uses GPT-4o-mini for educational interpretations. AI responses are not personalized financial advice and may be inaccurate. All core calculations are deterministic — AI only interprets results.AI Transparency →

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Industry-standard formulas vetted against IRS, SSA, BLS, CFPB. Client-side calculations. Regularly updated.

This calculator provides mathematical results for educational purposes. Always verify critical calculations independently.

Updated: January 2026 · Methodology

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