Population and sample

The totality of people, other living organisms or inanimate objects under study

If the population is finite, the number of its elements is called population size and Is denoted by

randomly selected representative part of population.

denotes the number Of elements in a sample and is called sample size.

A sample is small, if its size is less than

This Quantitative type data arise from the measuring process. The values of such data fill an interval; they are usually not integers.

This Quantitative data arise from the counting process. The values are integers.

This Qualitative data describe the categorical values which the qualitative variable can gain.

This Qualitative data describe the position of categorical values in a data series, where values are set from smallest to highest.

Characteristics of relation