Pre3
In describing a dataset, what does the mean represent?
(Usually) The arithmetic average.
What is the difference between a categorical and continuous variable?
Categorical are assigned to discrete categories; continuous can take any value in a range.
What is a scatterplot?
A graph where both the explanatory and response variables are continuous.
In describing a dataset, what does the standard deviation or standard error represent?
A measure of the variation around the estimate of the mean.
What is the difference between an explanatory (or independent) variable and a response (or dependent) variable?
Explanatory is the factor that varies in an experiment; response is measured as the explanatory variable varies.
What is a bar plot, and what do the vertical lines on a bar plot represent?
The height of a bar represents a mean; the vertical line usually represents the standard error.