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,
Sample Standard Deviation. A standard deviation of a sample estimates the standard deviation of a population based on a random sample. The sample standard deviation, unlike the population standard deviation, is a statistic that measures the dispersion of the data around the sample mean.tandard deviation refers to the amount of dispersion in a given data set. Researchers calculate the standard deviation of a data set by taking the square root of the variance, and the numerical result is indicated by the letter S. They use the term âvarianceâ to describe the extent of the data spread.