measures of central tendency

The definition of a variation series includes the following keyword

• quantity

• quality

• equal in magnitude

• ranked

The characterisation of the variation series includes

• ratio

• quality

• number

• total number of observations

Type of variation series

• complex

• combinational

• grouped

• chronological

The following types of average value are distinguished

• limit

• mode

• summed

• amplitude

The median is

• the most frequent variant in the variation series

• the variant that divides the variation series into two equal parts

• the difference between the extreme values of the variation series

• the boundary of each variant

Method of calculating the arithmetic mean

• solid

• simple

• combined

• group

The property of the mean includes

• has a specific character

• occupies a central position

• the sum of deviations of all variants from the mean is zero

• does not occupy the median position

The strong degree of diversity of the trait according to the coefficient of variation ( Cv) is:

• <30 %

• 10–20 %

• 20–30 %

• >20 %