Statistics calculators
9 free statistics calculators with step-by-step solutions.
Descriptive statistics
- Statistics calculator— Mean, median, mode, standard deviation, variance
- Linear regression— Find best-fit line, slope, intercept, R² value
Distributions
- Normal distribution— Probabilities and z-scores for normal distributions
- Binomial distribution— Calculate binomial probabilities P(X=k)
- Poisson distribution— Calculate P(X=k) for Poisson random variables
Probability & inference
- Probability calculator— Binomial probability, dice rolls, conditional probability
- Z-score calculator— Calculate z-score from raw score, mean, and std deviation
- Confidence interval— Calculate confidence intervals for population parameters
- Chi-square test— Goodness of fit test with χ² statistic
What is statistics?
Statistics is the science of collecting, analyzing, and interpreting data. Descriptive statistics summarize data, while inferential statistics draw conclusions about populations from samples.
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