Intro to Statistics

Learn Terms

Descriptive Statistics

It consist of methods for organizing, displaying, and describing data by using tables, graphs, and summary measures

Inferential Statistics

It consists of methods that use sample results to help make decisions or predictions about a population

Sample

A portion of the population selected for study

Random Sample

A subset of the population where each element has a chance of being selected

Variable

A characteristic under study that assumes different values for different elements

Element

A member of a sample or population about which information is collected

Discrete Variable

An entity that is countable and can only assume certain values with no intermediate values

Continuous Variable

A variable that can assume any numerical value over a certain interval or intervals.

Categorical Variables

A variable that cannot assume a numerical value but can be classified into two or more qualties.

Cross Selection Data

contains information on different elements of a population or sample for the same period of time

Gender is an example of ?

Nominal Scale

The activity or the process of collecting the data on the population is called…

A census

quantitative data refers to data obtained with a(n)

either interval or ratio

The nominal scale of measurement has the properties of the…

None of these alternatives is correct.

The process of summarizing data is called

descriptive statistics

The collection of all elements of interest in a particular study is…

the population

In a sample of 800 students in a unversity, 240, or 30%, are bussiness majors. The 30% is an example of…

descriptive statistics

to study the impact of advertising on various market segments researchers use…

inferential statistics

The entities on whivh data are collected are,

elements

Some hotels ask for guest to rate the hotels service as excellent, very good, good, and poor. This is an example of

Ordinal Scale