##### 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)

** σ^{2} (Sigma)- **Variance(population)

** s^{2} - **Variance (sample)

** μ (Mu)- **population 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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