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Intro to Statistics.pdf - Introduction to Statistics...

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Introduction toStatistics
2Statisticsis an art andscience that deals with thecollection, organization,creative presentation, analysis,and interpretation of data.
3Types of StatisticsDescriptive Statisticsis concerned with themethods of collecting, organizing andpresenting data appropriately and creatively todescribe or asses group characteristics.For example, the National Statistics Office orthe Philippine Statistics Authority conductssurveys to determine the average age, incomeand other characteristics of the Filipinopopulation
4Types of StatisticsInferential Statisticsis concerned withinferring or drawing conclusions aboutthe population based from pre-selectedelements of that population.It consists of generalizing from samplesto populations, performing hypothesistesting, determining relationshipsamong variables and making predictions
5In statistics, we commonly use theterms population and sample.A populationis the complete andentire collection of elements to bestudied.A sampleis a subset of a population
6A parameteris a numericalmeasurement describing somecharacteristics of a population.A statisticis a numericalmeasurement describing somecharacteristics of a sample
7Constantsrefer to the fundamentalquantities that do not change in value.

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