Managed by Sparky Anderson, the Reds of the 1970s were a virtual Hall of Fame gallery with Rose, Joe Morgan, Johnny Bench and Tony Perez. This team won back-to-back world championships (1975-76), four pennants and six division titles. Four Reds won Most Valuable Player awards.
Pooled standard deviation is a way to find a better estimate of the true standard deviation given several different samples taken in different circumstances where the mean may vary between samples but the true standard deviation (precision) is assumed to remain the same. It is calculated by. or with simpler notation,
By Courtney Taylor. Definition: The standard deviation measures how spread out a data set is from its mean. The standard deviation is the square root of the variance of a data set, and is calculated by this formula.Examples: 1  The data set 2,2,2,2,2 is not spread out at all, and has standard deviation of zero. 2  The data set 2,3,4,4,5,6 has standard deviation of approximately 1.4.efinition: The standard deviation measures how spread out a data set is from its mean. The standard deviation is the square root of the variance of a data set, and is calculated by this formula. Examples: