Std Deviation Formula. 9 5 2 16. In statistics the standard deviation is a measure of the amount of variation or dispersion of a set of values.
The mean of the data is 1 2 2 4 6 5 15 5 3. The sample standard deviation formula is. With the help of the variance and standard deviation formula given above we can observe that variance is equal to the square of the standard deviation.
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.
The mean of the data is 1 2 2 4 6 5 15 5 3. Standard deviation σ i 1 n x i x 2 n. Xi data set values. N number of values in the sample.
