Involves the analysis of the frequency of past events. (DATA)

It is the collection, organization, presentation, analysis, and interpretation of data.

The one who develops and applies appropriate methods in collecting and analyzing data.

BRANCHES OF STATISTICS

Summarization of data; graphs

Associating data

Prediction; experimental

TWO ASPECTS OF STATISTICS:

 Deals with development, derivation, and proof of statistical theorems, formulas, rules, and law.

Involve the application of these theorems, formulas, rules, and laws to solve the real word problem.

Q: Numerical characteristics or attributes associated with the population.

Q: Defined as a group of people, animals, places, things, or ideas.

Q: Subgroup of the population and a technique of collecting information.

A study that includes every member of the population.

TYPES OF VARIABLES:

The one used to explain the variation in the dependent variables; variables that are being manipulated.

The one being studied; variables that are registered/ measured.

Unorganized form, it involves reasoning and calculations. It is the value that a variable can assume.

Collection of measurements; It can be quantitative and qualitative.

TWO TYPES OF DATA

TWO TYPES OF QUANTITATIVE DATA

Can be separated with different categories, categorical, NON NUMERICAL

Counts & measurements, NUMERICAL

Countable number of values or number of outcomes. Nabibilang (countable)

Infinite continuous of possible values. Can assume any value. Nasusukat (measurable)

A variable has assumed numerical values with the random outcome of an experiment.

Set of all possible outcomes of an experiment.

Establish relationships between variables. This requires that the variables be measured.

Process measuring a variable requires a set of measurements.

LEVELS OF MEASUREMENTS:

Names/labels, Identifying purpose only, and measure of identity

Ranking or order, direction of difference between two individuals.

No natural or starting point. Specifies the precise difference between or among the values or ranks.

Reciprocal of interval scale, provides a number that reflects absolute zero. Present of units of measurements.