lecture 2 - t tests and chi squared Flashcards
1
Q
what does a t t test assess?
A
whether the means of 2 groups are statistically different from each other
2
Q
what does a chi squared test do?
A
looks at 2 different variables to see if there is a pattern or association between them
categorical variables
not scalar
*only 2 variables
3
Q
what is a scalar variable?
A
a quantity that has magnitude, but not direction
e.g. weight, height, age
4
Q
what does nominal mean?
A
refers to names
no rankings associated with nominal data
e.g. places, gender
(same as categorical data)
5
Q
what is ordinal data?
A
Categories that can be ordered/ranked
6
Q
What is categorical data?
A
variables that can be put into categories
