Week 2 Flashcards
What is Univariate analysis?
A single variable
What is Bivariate analysis?
Two variables
What is Multivariate analysis?
Three or more
variables
What is a research hypothesis?
A testable
statement of the expected relationship between two or more
variables
What is the opposite of a research hypothesis?
A null hypothesis
What is a independent variable?
variables we theorize to have an effect
on the dependent variable (X)
What is a dependent variable?
the variable we are interested in
explaining (Y)
What is a nominal variable?
A variable type that is only used to categorize something. There is no inherent ordering.
What is a ordinal variable?
A variable type where variables are ordered, but 1 isn’t twice as much as two. 0 is arbitrary (it has a designation but does not literally mean 0)
What is a ratio variable?
A ratio variable is a variable that has a defined unit of measurement e.g 0-10,000 - 20,000-30,000, etc. A zero in a ratio is a true variable.
What is a dichotomous/binary variable?
A dichotomous/binary variable has only two attributes and values. E.g did you vote in the last federal election?
What are the three types of sampling that are probability based?
Simple random, stratified, systematic.
What is the median?
The median is the middlemost point of your data. It
represents the 50th percentile, or the point at which 50
percent of the cases are above it and 50 percent of the cases
are below it.
What are the two types of probability?
Theoretical probability and empirical probability
