Standard Deviation Graph Percentages. Assume that the population mean is known to be equal to mu 10 and the population standard deviation is known to be sigma 5 first the requested percentage is 0 80 in decimal notation. It shows you the percent of population.
The empirical rule or the 68 95 99 7 rule tells you where most of the values lie in a normal distribution. Around 95 of values are within 4 standard deviations of the mean. 65 70 approximately 95 5 of the data series will be fitted in the range i e.
Around 95 of values are within 4 standard deviations of the mean.
A low standard deviation indicates that the values tend to be close to the mean also called the expected value of the set while a high standard deviation indicates that the values are spread out over a wider range. This is the bell shaped curve of the standard normal distribution. It is a normal distribution with mean 0 and standard deviation 1. Gauss bell curve graph.
