Elementary Data Analysis (EDA)

Measure of central tendency: 

·     Arithmetic mean/average 

·     Median- middle datum of sample – (50% above, 50% below) 

·     Mode- datum that occurs most often (frequency analysis) 

Measure of dispersion: 

·     Asses variation of data around median and mode 

-     Range 

-     Variance 

-     Coefficients of variance 

-     Standard deviation

-     Standard error

Range- numerical data between minimum and maximum 

Variance- measure of variation in data 

Standard Deviation- (SD) measure of spread of data around a mean 

Standard error- describe dispersion of sample mean around the population 

Coefficient of variation- compare amount of variation among data that differs- expressed as percentage 

Synthesis- population and samples (frequency distribution/ elementary statistics)