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.
Incidence is a measure of the probability of occurrence of a given medical condition in a population within a specified period of time. Although sometimes loosely expressed simply as the number of new cases during some time period, it is better expressed as a proportion or a rate with a denominator.ncidence should not be confused with prevalence, which is the proportion of cases in the population at a given time rather than rate of occurrence of new cases. Thus, incidence conveys information about the risk of contracting the disease, whereas prevalence indicates how widespread the disease is.