Franklin D. Roosevelt: Life Before the Presidency. Franklin D. Roosevelt: Life Before the Presidency. Franklin Delano Roosevelt was born to James and Sara Roosevelt in 1882. James was a land-owner and businessmen of considerable, but not awesome, wealth from New York.
How to Measure Variability in Statistics. Statisticians use summary measures to describe the amount of variability or spread in a set of data. The most common measures of variability are the range, the interquartile range (IQR), variance, and standard deviation.
Definition: Prevalence is a term which is used to denote the measurements of disease frequency. Prevalence of a disease is the proportion of population affected by a specific disease at a particular time.This tutorial explains you how to calculate the Prevalence rate of Disease.