STATISTICS

Interview

This can be done personal, through phone or internet access.

Indirect Method

A technique in which *questionnaire* is used to elicit the information or data needed.

Direct Method

A *person to person encounter* between the interviewee and the interviewer.

Parameter

A numerical measurement *describing* some characteristics of a *population*.

Interviewee

This is the *source* of information.

Qualitative Variables

It describe a certain type of information *without using numbers*.

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Examples: Color, Taste, Occupation, Gender and Preference to eating vegetables.

Sample

A *subset* of a population.

Interval scale

A(n) ________ must have a common and *constant unit of measurement.*

Experimental Methods

A system used to gather data from the results of performed ***series of experiments*** on same *controlled* and *experimental variables*.

Quantitative Variables

It measure or identify an information using *numeric scales*.

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Examples: Height, number of Siblings, speed of a car, temperature, number of students in a classroom, amount of shirt in the drawer.

Interviewer

The one who gathers the information.

Descriptive Statistics

It is a method concerned with the **collection**, description, and **analysis** of **a set of data** __*without drawing conclusions*__ of inferences about a larger set

Inferential Statistics

It is a methods concerned with __*making predictions or inferences*__ about a larger set of data using only the information gather from a subset of this larger set.

Registration Method

It obtains data from the __*records of the government agency*__ authorized by law to keep such data or information and made these available to the researchers

Observation Method

A technique in which data particularly those pertaining to the ***behaviors of individuals*** or group of individuals during the given situation are best describe through *observation*.

Experimental Methods

A system used to gather data from the results of performed __*series of experiments*__ on same controlled and experimental variables.

Qualitative Variables

Color, Taste, Occupation, Gender and Preference to eating vegetables.

Quantitative Variables

Height, Number of Siblings, Speed of a car, Temperature, Number of students in a classroom, Amount of shirt in the drawer.

Continuous variable

Height, speed of a car, temperature

Population

It is the *collection of all elements* under consideration in a statistical study.

Census survey

It is conducted by *gathering information* from the __*entire population.*__

Sampling survey

It is conducted by *gathering information* __*only*__ from __*part of the population*__