Study Guides (256,177)
CA (124,572)
UTSG (8,518)
Geography (229)
GGR270H1 (28)
Final

Week 4 Study Notes

5 Pages
97 Views

Department
Geography
Course Code
GGR270H1
Professor
Damian Dupuy

This preview shows pages 1-2. Sign up to view the full 5 pages of the document.
GGR 270 Lecture 4 October 6, 2010
Normal Distribution Z Scores
Standard scores are referred to as Z Scores
Indicate how many Standard Deviations separate a particular value from the mean
Z Scores can be positive or negative depending if they are > or < the mean
Z score of the mean is O and the Standard Deviation is positive or negative
Table of normal values provides probability info on a standardized scale
But, we can also calculate Z scores
Formula involves comparing values to the mean value, and dividing by the Standard
Deviation
Expressed as:
Result is interpreted as the number of standard deviations an observation lays above
or below the mean.
Skewness
Measures the degree of symmetry in a frequency distribution
Determines how evenly the values are distributed either side of the mean
Expressed as:
www.notesolution.com
Coefficient of variation
Allows for comparison of variability of spatial samples
Tests which sample has the greatest variability
Standard deviation or variance are absolute measures, so they are influenced by the
size of the values in the dataset
To allow a comparison of variation across 2 or more geographic samples, can use a
relative measure of dispersion called coefficient of variation
Expressed as:
Describing Bivariate data
Graphs
Comparative pie-charts
Stacked bar chart
Correlation
Allows us to observe statistically the relationship between 2 variables
Looking at the strength and direction of the relationship between 2 variables
Most common graphing technique is the scatter plot
Direction of the Bivariate relationship
www.notesolution.com

Loved by over 2.2 million students

Over 90% improved by at least one letter grade.

Leah — University of Toronto

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah — University of Toronto
Saarim — University of Michigan

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim — University of Michigan
Jenna — University of Wisconsin

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna — University of Wisconsin
Anne — University of California

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne — University of California
Description
GGR 270 Lecture 4 October 6, 2010 Normal Distribution Z Scores Standard scores are referred to as Z Scores Indicate how many Standard Deviations separate a particular value from the mean Z Scores can be positive or negative depending if they are > or < the mean Z score of the mean is O and the Standard Deviation is positive or negative Table of normal values provides probability info on a standardized scale But, we can also calculate Z scores Formula involves comparing values to the mean value, and dividing by the Standard Deviation Expressed as: Result is interpreted as the number of standard deviations an observation lays above or below the mean. Skewness Measures the degree of symmetry in a frequency distribution Determines how evenly the values are distributed either side of the mean Expressed as: www.notesolution.com
More Less
Unlock Document


Only pages 1-2 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit