Basic Definitions in Statistics
Statistics
discipline that concerns the collection, organization, analysis, interpretation and presentation of data. The presentation of which is in some way relevant to numerical data.
What are nominal variables? Provide one example
Qualitative variable that represents categories that do not have a natural order.
(1) What levels of variable can be considered qualitative variables? (2) What level(s) of variable can be considered quantitative?
1) Nominal & Ordinal
2) Ordinal, Interval & Ratio
In statistical term, define population:
**the collection of all outcomes, responses, or counts that are of interest. I
Is a set of similar items or events which is of interest for some question or experiment.
The entire pool from which a statistical sample is drawn.
What are ordinal variables? Provide one example
Variable categories that have a natural order.
(1) What are qualitative variables.(2) What are quantitative variables. Provide an example for both.
(1) Are based on categories, they're identifiable by their name or label. they're known as non-measurement variables. (2) Variables that are measured on a numerical scale.
In statistics what is a parameter?
A numerical description of a population characteristic
What are interval variables? Provide one example.
Variable in which the distance between points is meaningful.
What is descriptive statistics?
Statistical data used to provide descriptions of the population, either through numerical calculations or graphs or tables.
What is a statistic?
A numerical description of a sample characteristic
What are ratio variables? Provide one example
Variable where the distances between points is significant, and the zero point represents the absence of the variable.
What is inferential statistics?
Statistics used to make inferences and predictions about a population based on a sample of data taken from the population in question.