Calculate standard deviation in excel



One of Excel statistical functions is the standard deviation function.This function can be used to calculate the standard deviation of dataset. The standard deviation is a measure of how widely values are dispersed from the average value (the mean).

Syntax for standard deviation

STDEV(number1,number2,...)

With
Number1, number2, ... are 1 to 255 number arguments corresponding to a sample of a population. You can also use a single array or a reference to an array instead of arguments separated by commas.

Notes :
a. STDEV assumes that its arguments are a sample of the population. If your data represents the entire population, then compute the standard deviation using STDEVP.
b. The standard deviation is calculated using the "n-1" method.
c. Arguments can either be numbers or names, arrays, or references that contain numbers.
d. Logical values and text representations of numbers that you type directly into the list of arguments are counted.
e. If an argument is an array or reference, only numbers in that array or reference are counted. Empty cells, logical values, text, or error values in the array or reference are ignored.
f. Arguments that are error values or text that cannot be translated into numbers cause errors.
g. If you want to include logical values and text representations of numbers in a reference as part of the calculation, use the STDEVA function.

With using excel, we can quickly calculate the standad deviation

For examples :

1. Create table below
standard deviation


2. On the cells C3 type formula:
=STDEV(A3:A13)

You can download excels files in format xlsx on attachments files.


Ĉ
papao nn,
Oct 11, 2011, 10:39 AM
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