N or n:      ∑x_i:      ∑x²:    RMS:

Measures/statistics of central tendancy/location/middle/center/typical:
    Mean x̄ or μ:      Median ̃x:     Mode: uni: bi:     Midrange:

Measures/statistics of dispersion/variation/spread/uncertainty:
   Range:   Standard deviation s or σ_n-1:    σ_n:

   Variance σ²      SEM=s/√n:

   Sample coefficient of variation, CV=s/x̄*100

   MAD (mean [absolute] deviation): MAD≤σ  Normal:

   min: Q1: Q3: IQR: max:   

   Hildebrand H=(x̄-̃x)/s: If |H|<.2, symmetric. H>.2 right skewed, H<-.2 left skewed    
Skew: |skew|<.5 symmetric, between .5 and 1 moderately skewed, >1 highly skewed.    
(Excess) Kurtosis: "tailedness"

Sorted data:

Freq. distribution      Datums      Frequency   Rel. freq.
    

Z scores: σ_n-1

Z scores: σ_n

crude Histogram:

X min: X max: Y max: Class size/width: