There's also a formula to find the standard deviation of an entire population, which is identical, except you divide by N rather than (N-1) in step four. Interpreting standard deviation.

Another way to interpret the normal distribution is to say that the probability of Apple’s return (at a range of -1.83 percent and 1.99 percent) falling within -1 and 1 standard deviation from ...

Standard deviations are important here because the shape of a normal curve is determined by its mean and standard deviation. The mean tells you where the middle, highest part of the curve should go.

In a normal distribution, individual values fall within one standard deviation of the mean, above or below, 68% of the time. Values are within two standard deviations 95% of the time.

standard deviation number lines. Business Insider/Andy Kiersz In both companies, the average wage is $20 an hour, but the distribution of hourly wages is clearly different.

The formula for pooled standard deviation. In the formula above, n is the sample size of the group, S squared the group ...

Standard deviation measures how far numbers in a data set are spread out from an average value. In investing, it is used as a measurement of portfolio volatility.

Calculating standard deviation manually can be time-consuming and complex. Excel's STDEV formula can automatically calculate the standard deviation of any set of numbers, so you don't have to go ...

Use Excel to calculate daily returns and standard deviation to gauge stock volatility. Annualize volatility by multiplying daily standard deviation by the square root of 252. Remember, standard ...

Standard deviation is a common statistical measurement and is defined by Oxford Dictionaries as: ... In a normal distribution, 68% of values are within 1 standard deviation of the mean, ...