Author: Oscar CronquistArticle last updated on December 07, 2020
The STDEV.P function returns standard deviation based on the entire population.
The standard deviation is how widely numbers are distributed around the average value.
Formula in cell D3:
=STDEV.P(B3:B12)
Excel Function Syntax
STDEV.P(number1, [number2], ...)
Arguments
number1
Required. The first number argument that represents a population.
[number2]
Optional. Up to 253 additional number arguments.
Comments
The STDEV.P function ignores logical values and text values.
For large sample sizes, STDEV.S and STDEV.P return approximately equal values.
How to use the STDEV.P function
What is Standard Deviation?
Standard deviation tells you how far from the average values are spread out. Both charts above have numbers and an average plotted, they share the same average however, the numbers are not the same.
Chart A above shows that the values are more spread out than the values in chart B. Chart A has a standard deviation of 23.45256334, standard deviation for chart B is 5.207075606. Standard deviation is used in statistics.
How is the output from the STDEV.P function calculated?
The STDEV.P function is entered in cell D3, here is how the function calculates the output:
x Ì… is the average.
n is how many values.
Step 1 - Calculate the average
137+139+141+105+139+124+126+146+105+101 = 1263
1263/10 = 126.3
Step 2 - Subtract the average and square the result for all values
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