Standard Deviation Example. Work out the standard deviation. One can find the standard deviation of an entire population in cases such as standardized testing where every member of a population is sampled in cases where that cannot be done the standard deviation σ is estimated by examining a random sample taken from the population and computing a statistic of the sample which is used as an estimate of the population standard deviation.
The data follows a normal distribution with a mean score of 50 and a standard deviation of 10. The variance is defined as. Results of a survey.
This value is the sample variance.
A class of students took a math test. This value is the sample variance. In the formula above μ the. Use a calculator to obtain this number.
