Chapter13_Part1

# Chapter13_Part1 - Text Part 5 (p. 191) Statistical...

This preview shows pages 1–7. Sign up to view the full content.

Text Part 5 (p. 191) Statistical Relationship Between Variables Spatial association (map patterns) Correlation analysis (Ch. 13) Measure of strength of association E.g., income level and crime rates are strongly correlated Regression Analysis (Ch. 14) A known association is used to predict E.g., if we know income level we can predict crime rates

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Chapter 13: Correlation Introduction Correlation Analysis Based on a series of paired measurements The study of association between two variables Spatial: two variables measured at the same location in space. A paired measurement Temporal: two variables measured at the same time.
Chapter 13: Correlation Paired Measurements Spatial: E.g., each point on the map has a set of paired measurements: Temperature; Elevation. There are 12 pairs in total.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Chapter 13: Correlation Paired Measurements Temporal: 12 hourly measurements would yield 12 pairs in total. E.g., this weather station logs a set of paired measurements every hour: Temperature; Wind speed.
Chapter 13: Correlation Correlation Correlation can be represented in two ways: 1. Graphically: Scatter gram or Scatter plot Variable X Variable Y 2. Numerically: Correlation Coefficient -1 to <0: negative correlation 0: no correlation >0 to +1: positive correlation

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Chapter 13: Correlation Correlation Scatterplot (graph) or coefficient (value) reveals: 1. Direction of association 2. Strength of association Positive : both variables increase in magnitude. Negative
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 01/18/2011 for the course GEOG 339 taught by Professor Staff during the Fall '10 term at University of Calgary.

### Page1 / 19

Chapter13_Part1 - Text Part 5 (p. 191) Statistical...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online