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 of variance. 1 : the fact, quality, or state of being variable or variant : difference, variation yearly variance in crops. 2 : the fact or state of being in disagreement : dissension, dispute. 3 : a disagreement between two parts of the same legal proceeding that must be consonant.