Note: Cost per vote is the total amount raised by the candidate divided by the number of he or she received in the election. 1  The New York Times, Donald Trump Selects Senator Jeff Sessions for Attorney General, November 18, 2016. 2  Alabama GOP, 2016 Republican National Convention Delegates, accessed April 11, 2016.
Incidence. The basic incidence rate (sometimes called just incidence) is a measure of the frequency with which a disease occurs in a population over a period of time. The formula for calculating an incidence rate is: 1  The numerator (x). 2  should include only new cases of the disease that occurred during the specified period.
The three most important measures of dispersion are defined as follows: 1  The range is the difference between the highest score and the lowest score in a variable. 2  The interquartile range is the difference between the upper quartile and the lower quartile in a set of ordered scores. 3  The standard deviation (often abbreviated to Std.