📈 Statistics
Statistics Calculators
Mean, median, mode, standard deviation, and ratio tools.
8 tools in this category
Showing 8 of 8
- Standard Deviation CalculatorSample or population standard deviation, variance, and mean.
- Z-Score CalculatorCompute how many standard deviations a value is from the mean.
- Percentile Rank (Simple)Approximate percentile rank of a score within a data set.
- Combination & PermutationCompute nCr and nPr for counting problems.
- Mean Confidence Interval (Approx)Approximate 95% CI for a mean using z≈1.96 (large sample).
- Mean Absolute DeviationAverage absolute distance of data points from the mean.
- Z-Score from Raw ScoreConvert a raw score to a z-score given mean and standard deviation.
- Margin of Error (Rough)Rough margin of error for a proportion: z × √(p(1−p)/n).