VARA function

Estimates variance based on a sample. In addition to numbers, text and logical values such as TRUE and FALSE are included in the calculation.

Syntax

VARA(value1,value2,...)

Value1,value2,...     are 1 to 30 value arguments corresponding to a sample of a population.

Remarks

• VARA assumes that its arguments are a sample of the population. If your data represents the entire population, you must compute the variance using VARPA.

• Arguments that contain TRUE evaluate as 1; arguments that contain text or FALSE evaluate as 0 (zero). If the calculation must not include text or logical values, use the VAR function instead.

• VARA uses the following formula:

  

Example

Suppose 10 tools stamped from the same machine during a production run are collected as a random sample and measured for breaking strength.

St1	St2	St3	St4	St5	St6	St7	St8	St9	St10	Formula	Description (Result)
1345	1301	1368	1322	1310	1370	1318	1350	1303	1299	=VARA([St1], [St2], [St3], [St4], [St5], [St6], [St7], [St8], [St9], [St10])	Estimates the variance for the breaking strength (754.2666667)