# Top 50 Fundamental Statistical Functions

- Mean (Arithmetic Average)
- Median
- Mode
- Range
- Variance
- Standard Deviation
- Coefficient of Variation
- Percentiles
- Quartiles
- Interquartile Range (IQR)
- Skewness
- Kurtosis
- Covariance
- Correlation Coefficient (Pearson)
- Spearman's Rank Correlation
- Mean Absolute Error (MAE)
- Mean Squared Error (MSE)
- Root Mean Square Error (RMSE)
- Mean Absolute Percentage Error (MAPE)
- R-squared (Coefficient of Determination)
- Adjusted R-squared
- Z-score (Standard Score)
- T-score
- F-statistic
- Chi-square Statistic
- P-value
- Confidence Interval
- Standard Error
- Margin of Error
- Effect Size (Cohen's d, Hedges' g)
- Odds Ratio
- Relative Risk
- Poisson Distribution
- Normal Distribution (Gaussian)
- Binomial Distribution
- Exponential Distribution
- Weibull Distribution
- Log-normal Distribution
- Student's t-Distribution
- F-Distribution
- Beta Distribution
- Gamma Distribution
- Geometric Mean
- Harmonic Mean
- Moving Average
- Exponential Moving Average
- Weighted Average
- Cumulative Sum
- Autocorrelation Function (ACF)
- Partial Autocorrelation Function (PACF)