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Ch 3 Stats Symbols

Important symbols to know in studying elementary statistics - Chapter 3

TermDefinition
Σ Sum of a set of values
N Number of data values in a population
n Number of data values in a sample
μ Mean of all values in a population
x̄ Mean of all values in a sample
σ Population standard deviation
s Sample standard deviation
σ^2 Population variance
s^2 Sample variance
z z score
P_k k^th percentile
Q_1 First quartile = P_25
Q_2 Second quartile (median) = P_50
Q_3 Third quartile = P_75
IQR Inter quartile range
μ–2σ Significantly low values
μ+2σ Significantly high values
Created by: gboxdorfer
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