**Functions** |
**What it Does** |

**AVERAGE** |
Returns the average of its
arguments |

**COUNT** |
Counts how many numbers are in
the list of arguments |

**AVERAGEA** |
Returns the average of its
arguments, including numbers, text, and logical values |

**COUNTA** |
Counts how many values are in
the list of arguments) |

**RANK** |
Returns the rank of a number in
a list of numbers |

**LARGE** |
Returns the k-th largest value
in a data set |

**SMALL** |
Returns the k-th smallest
value in a data set |

**New Functions in Excel 2007** |

AVERAGEIF |
Calculates the average within a range that meet a given criteria **(SUMPRODUCT does better)** |

AVERAGEIFS |
Calculates the average within a range that meet one or many given criteria **(SUMPRODUCT does better)** |

COUNTIFS |
Counts the number of nonblank
cells within a range that meet the given criteria **(SUMPRODUCT does better)** |

**LARGE, SMALL**

And what if you want the second or third largest value or the second smallest value. Use LARGE and SMALL like this:

**=LARGE(A1:A5,2), =LARGE(A1:A5,3), =SMALL(A1:A5,2)**

You can use these functions with dates.

As a matter of facts you can forget about MIN and MAX with:

=LARGE(A1:A5,1), =SMALL(A1:A5,1)

**COUNT and COUNTA**

If you want to count the number of cells that are not blank COUNT and COUNTA will return a different result if in one of the cells there is a text. OR A SPACE

**=COUNT(A1:A5)** will return 5 is only numbers OR DATES are present in cells A1 to A5 and 4 if there is a letter, an empty cell OR A SPACE in one of the cells. The SPACE thing is important to remember when you are importing
data from an external source.

**=COUNTA(A1:A5)** will return 5 unless one of the cells is empty. If all the cells contain numbers, letters OR SPACES the result will be 5.

**AVERAGE and AVERAGEA**

Watch for dates! If you want the average of a range and there is a date within there is a problem because dates are numbers. If all the cells are dates, indeed you can calculate the average date of.... The difference between AVERAGE and AVERAGEA becomes evident when one of the cells contains a text OR A SPACE and don't forget the SPACE. A cell containing a space is NOT empty.