# Manuals/calci/STDEV

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STDEV()

• Parameters are set of numbers.
• STDEV(), estimates standard deviation based on a sample.

## Description

• This function gives the Standard Deviation based on a given sample.
• Standard Deviation is the quantity expressed by, how many members of a group differ from the mean value of the group.
• It is the used as a measure of the dispersion or variation in a distribution.
• It is calculated as the square root of variance.
• In , Parameters are set of numbers to find the Standard Deviation.
• Here First parameter is required. From the second parameter are optional.
• Instead of numbers, we can use the single array or a reference of a array.
• is defined by the formula:

where is the sample mean of and is the total numbers of the given data.

• It is calculated using method.
• This function is considering our given data is the sample of the population.
• Suppose it should consider the data as the entire population, we can use the STDEVP function.
• The arguments can be be either numbers or names, array,constants or references that contain numbers.
• Suppose the array contains text,logical values or empty cells, like that values are not considered.
• When we are entering logical values and text representations of numbers as directly, then the arguments are counted.
• Suppose the function have to consider the logical values and text representations of numbers in a reference , we can use the STDEVA function.
• This function will return the result as error when
1. Any one of the argument is non-numeric.
2. The arguments containing the error values or text that cannot be translated in to numbers.

## Examples

A B C D E F
1 0 4 6 10 12 15
2 7 3 -1 2 25
3 9 11 8 6 15
1. =STDEV(18,25,76,91,107) = 39.8660256358
2. =STDEV(208,428,511,634,116,589,907) = 267.0566196431
3. =STDEV(A1:F1) = 5.52871293039
4. =STDEV(A2:D2) = 3.304037933599
5. =STDEV(A3:B3) = 1.414213562373
6. =STDEV(12,18,27,32,FALSE) = 12.617448236470002

## Related Videos

STANDARD DEVIATION