Arithmetic Mean
statistics
Finds the average of n values.
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Weighted Mean
statistics
Finds an average when observations carry different weights.
Geometric Mean
statistics
Finds the nth root of a product of positive values.
Harmonic Mean
statistics
Finds a reciprocal-based average for nonzero values.
Range
statistics
Measures spread as maximum minus minimum.
Population Variance
statistics
Measures population spread around the population mean.
Sample Variance
statistics
Estimates variance from a sample using Bessel’s correction.
Population Standard Deviation
statistics
Measures population spread in the original units.
Sample Standard Deviation
statistics
Estimates sample spread in the original units.
Z-Score
statistics
Expresses a value in population standard deviations from the mean.
Coefficient of Variation
statistics
Compares sample variability relative to its mean.
Sample Covariance
statistics
Measures joint sample variation of two variables.
Pearson Correlation Coefficient
statistics
Standardizes linear association between two sample variables.
Simple Linear Regression Slope
statistics
Finds the least-squares slope for simple linear regression.
Simple Linear Regression Intercept
statistics
Finds the intercept of a simple least-squares line.
Standard Error of the Mean
statistics
Estimates the standard deviation of a sample mean.
Mean Confidence Interval
statistics
Gives a t-based confidence-interval form for a population mean.
Normal Standardization
statistics
Transforms a normally distributed value to standard-normal notation.