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Stats without Tears
Statistics Symbol Sheet

Updated 21 Feb 2014 (What’s New?)
Copyright © 2002–2017 by Stan Brown

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Relational Symbols
  =   equals
is the same as
     is not equal to
is different from
  >   is greater than
is more than
is above
or >=  
is greater than or equal to
is at least
is not less than
  <   is less than
is fewer than
is below
or <=  
is less than or equal to
is at most
does not exceed
is not greater than
is no more than
A < x < B x is between A and B, exclusive
A ≤ x ≤ B x is between A and B, inclusive
A ≈ B A is approximately equal to B

Here are symbols for various sample statistics and the corresponding population parameters. They are not repeated in the list below.

n N number of members of sample or population
“x-bar” μ “mu”
or μx
M or Med (none) median
(TIs say Sx)
σ “sigma”
or σx
standard deviation
For variance, apply a squared symbol (s² or σ²).
r ρ “rho” coefficient of linear correlation
“p-hat” p proportion
z   t   χ² (n/a) calculated test statistic

μ and σ can take subscripts to show what you are taking the mean or standard deviation of. For instance, σ (“sigma sub x-bar”) is the standard deviation of sample means, or standard error of the mean.

Roman Letters

Greek Letters

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