Stats

Some key principles that I remember from statistics include probability, regression, standard deviation, and the empirical rule. Probability is the chance that something will happen given certain conditions. Regression an estimation of the relationship between variables (for example X and Y). Standard deviation is a measure that is used to quantify how far a value is from the mean of the population and/or sample. The empirical rule states that 68 percent of data on a standard distribution will fall within one standard deviation from the mean, 95 percent of the data will fall within two standard deviations of the mean, and finally 99.7 percent of the values fall within three standard deviations of the mean.