* This function is identical to the AVERAGE function except that logical values and text are included in the denominator.
* This function includes hidden rows.
* Arguments that are numbers are included.
* Arguments that are zero are included.
* Arguments that are dates are included.
* Arguments that evaluate to True are included and 1 is used.
* Arguments that evaluate to False are included and 0 is used.
* Arguments that are text are included and 0 is used.
* If any cell references contain an error, then that error is returned. (Row 15)
* If any cell references are empty, then these are ignored.
* You can have a maximum of 255 arguments.
* You can use the AVERAGEIF function to satisfy one condition.
* You can use the AVERAGEIFS function to satisfy multiple conditions.
* For an illustrated example refer to the page under Central Tendency.
* This is similar to the COUNTA function.
* This is similar to the MAXA function.
* This is similar to the MINA function.
* For the Microsoft documentation refer to support.office.com