Calculadora de Estatística Online Grátis
Mean, median, mode, std dev, IQR, quartiles & histogram
The Statistics Calculator computes descriptive statistics — mean, median, mode, standard deviation, variance, IQR, and quartiles — from any dataset you enter. It generates a histogram to visualize the distribution, making it practical for data analysis courses, research projects, and quality control work. Paste in a list of numbers separated by commas or spaces and all metrics appear instantly.
Frequently Asked Questions
Sobre Esta Calculadora
Descriptive statistics summarize what a dataset looks like — its center, spread, and shape — without making inferences beyond the data itself. This calculator automates all the standard measures: mean (arithmetic average), median (middle value), mode (most frequent), standard deviation, variance, IQR, and quartile boundaries. A histogram updates dynamically as you change data.
The calculator distinguishes between population and sample standard deviation (dividing by n vs. n−1), which matters for statistical inference. Quartiles are computed using the standard inclusive method, consistent with most textbooks and spreadsheet software.
Statistics calculators are used widely in academic research, quality control (Six Sigma practitioners track standard deviations closely), finance (portfolio volatility is a standard deviation), and any field where you need to understand how data is distributed before drawing conclusions.
Trate seu rol de variâncias compreendendo rapidamente as tendências contidas nos dados estatísticos e sua distribuição logarítmica ou normal.
Exemplo Resolvido
Descriptive statistics for a set of 7 test scores
Entradas:
- Dataset: 72, 85, 91, 68, 85, 79, 94
Passo a Passo:
- Sort values: 68, 72, 79, 85, 85, 91, 94
- Mean: (68+72+79+85+85+91+94) ÷ 7 = 574 ÷ 7 = 82.0
- Median: middle value (4th of 7) = 85
- Mode: 85 (appears twice)
- Range: 94 − 68 = 26
- Variance: Σ(xᵢ − mean)² ÷ n = [(196+100+9+9+9+81+144)] ÷ 7 = 548 ÷ 7 ≈ 78.3
- Standard deviation: √78.3 ≈ 8.8