Week 1

# Week 1 - PSTAT Chapter 1 Section 1.1 Statistics Statistics...

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PSTAT Chapter 1 Section 1.1 Statistics – Statistics is a group of methods that are used to collect, analyze, present and interpret data and to make decisions 1. Descriptive Statistics – consists of methods for organizing, displaying and describing data by using tables, graphs, and summary statistics 2. Inferential Statistics – consists of methods that use sample results to help make decisions or predictions about a population 3. Population – set of all elements of interest in a particular study 4. Sample – subset of the population 5. Parameters – Numerical descriptive measures for a population 6. Statistics – corresponding numerical descriptive measures calculated from a sample Ex. 225 students population 10 students sample Average GPA parameter (you get the average from the sample) Section 1.2 - Data 1. Quantitative Data – represent the amount or quantity of something Ex. Height (6.2, 5.6, 5.3, 5.11) GPA (3.75, 2.95, 3.01) 2. Qualitative Data – can be categorized but not in terms of amount or

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## This note was uploaded on 09/12/2011 for the course PSTAT 5E taught by Professor Eduardomontoya during the Fall '08 term at UCSB.

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Week 1 - PSTAT Chapter 1 Section 1.1 Statistics Statistics...

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