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The following article introduces you to the VARA function - one of the functions in the statistical function group is very popular in Excel.
Description: The function performs a calculation of variance based on a sample, including logical and text values.
Syntax: VARA (value1, [value2], .)
Inside:
- VARA (value1, [value2], .: The arguments in the whole need to calculate the variance, where value1 is the required argument, the next arguments are optional and contain up to 254 value arguments .
Attention:
- The VARA function assumes that its arguments are a sample of the population.
- Arguments can be numbers, names or arrays that contain numbers.
- If the argument is an array or a reference, only values in that array are used.
- When typing logical values and presenting numeric values into function arguments -> these values are still calculated.
- True value is 1 default, false value is 0 default.
- Function error occurs when arguments are text or error values cannot be converted.
- If you do not want to calculate both logical values and text -> use the VAR function .
- The equation to calculate the VARA function is:
[frac {{sum {{{left ({x - overline x} right)} ^ 2}}}} {{left ({n - 1} right)}}]
Inside:
+ x is the sample mean AVERAGE (number1, number2, .)
+ n is the sample size.
For example:
Calculate variance based on a sample of number values in the following data table:
- In the cell to calculate, enter the formula : = VARA (D6: D10)
- Press Enter -> variance based on a sample of number values is:
- Here the calculated logical values correspond to its default values.
- Where the value is text or logic -> the function still calculates and returns the result:
Above are instructions and some specific examples when using VARA function in Excel.
Good luck!
