Normal+Distributions+When+Given+a+Percent

A normal distribution a very important statistical data distribution that is shaped like a bell curve. Normal Distributions are symmetrical with a single peak at the mean of the data. Fifty percent of the distribution lie to the left of the mean and fifty percent lie to the right. The distribution of the data is dependent on the standard deviation. The smaller the standard deviation, the more concentrated the data will be on the data.

Empirical Rule: - 68% of the data lies within one standard deviation of the mean - 95% of the data lies within 2 standard deviations from the mean - 99.7% of the data lies within 3 standard deviations from the mean

IQR (Inter Quartile Range) - The mean containing 50% of the data. - IQR is calculated by subtracting the first quartile from the third quartile