GEOG 3MB3 Lecture Notes - Lecture 1: Rational Number, Categorical Variable
28 May 2018
School
Department
Course
Professor
September 9, 2016
Key terms for today
Property
- Property means an attribute or characteristic of a thing
- There are different types of properties, sometimes they are numbers like weight
or length
- Statistics is largely just taking properties and reducing them to something that is
more useful or factual
Population
- Population is just a complete group of things with 1 or more quantiļ¬able
descriptive properties that are held in common
- It is used informally all the time but what population really means is actually
heavily under debate
- This is every bit of data within the given boundaries provided
- So these numbers are all properties of the population
Parameter
- Some number that describes a property of a population
- Much of stats is about trying to estimate unknown parameters
- We almost never know true properties
- Number of Canadiansā¦. 1.2 million
- Average student debt ā 26 000 ā this varies per province many other provinces
are much cheaper than Ontario
- Gangnam style has 2.6 billion views, he probably made about 6 million dollars
from this (there is only one thing in this population so the parameter is easy to
ļ¬nd, because there can only be 1 thing)
- For the number of Canadians in food service ā it is hard to get the parameter
because the population is harder to deļ¬ne
Sample
- Set of data selected from a population using a speciļ¬ed set of rules
- Often used because there is no practical way to get information from a population
Statistic
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