22 May 2017

Common symbols used in statistical tests


Each statistical tests or methods has its own terminology and symbols, but the following are commonly used by all statisticians / researchers

N – Size of population

n - number of observations (sample size)

K - number of samples (each having n elements)

α (Alpha) - level of significance

v (Nu)- degrees of freedom

σ (Sigma)- standard deviation (population)

s - standard deviation (sample)

σ2 (Sigma)- Variance(population)

s2 - Variance (sample)

μ (Mu)- population mean

clip_image002 - sample mean

ρ (Rho)- population correlation coefficient

r - sample correlation coefficient

β (beta)- regression coefficients (population)

b - regression coefficients (sample)

Z - standard normal deviate

To understand types of error - WHAT ARE TYPE I AND TYPE II ERRORS?

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