Bivariate data set : data set consisting of observations on three different attributes.

.............data set consisting of observations on two or more attributes

Bivariate data are a special case of multivariate data

each sample of the same size has the same chance (probability) of being selected.

we first divide the population into nonoverlapping subgroups, which are called strata

Cluster Sampling : the whole population is first divided into (geographical) subgroups called strata

if mean > median, then .................. (مهم اوووي)

if median > mean, then.......... (مهم اوي)

The information is recorded as numbers and represents an objective measurement or a count

Taste, eye, colour, architectural style

The information represents characteristics that you do not measure with number

Histograms are a standard way to graph .............. variables.

Bar charts are a standard way to tree discrete variables

Nominal -Binary-Ordinal

Data recorded in the sequence in which they are collected and before they are processed or ranked.

Data sets are organized into tables, and data are displayed using ..........

A frequency distribution for qualitative data lists all categories and the number of elements that belong to each of the categories.

Relative frequency of a category =

Data presented in the form of a frequency distribution are called ungrouped data.

The bar graph and the pie chart are two common types of graphs that are used to display quantitative data.