Continuity for a point exists when the left and right sided limits match the function evaluated at that point. For a function to be continuous, the function must be continuous at every single point in an unbroken domain.
An outlier is an observation that lies an abnormal distance from other values in a random sample from a population.
The range of a data set is the difference between the smallest value and the greatest value in the data set.
The rank of an observation is the number of observations that are less than or equal to the value of that observation.
The square root of the variance is the standard deviation. Standard deviation is one way to measure the spread of a set of data.
Make and interpret stem-and-leaf plots and histograms for a set of data.