Module 5 Flashcards
What is the explanatory variable?
The variable that causes change in another
What is the response variable?
The variable that is affected by the change
Which graph best shows two categorical variables?
A two way table (like a grid)
Which graph best shows an explanatory variable that is categorical, and a response variable that is quantitative?
Side-by-side box plots
If both variables are quantitative, what graph is best used?
Scatterplot
What is a marginal frequency?
The sum of the numbers in a corresponding row or column
What is a joint frequency?
The data that falls in a box in a grid (matching both variables)
What is correlation?
The relationship between the x variable and the y variable
What is a contingency percentage
The % of the total in each row
What’s a relative frequency?
% of each row, in decimal format
True or false: a scatterplot always shows the explanatory variable on the horizontal, or x-axis
True
What is a non-linear relationship on a scatterplot?
When there is a curve, like a v or n on a scatterplot
The strength of two quantitative variables can be seen as:
tightly grouped points on a scatterplot
Nonlinear is aka?
Curvilinear
