
Excel Chapter 21 of 24: Excel Statistical Functions and Formulas Excel offers you 80 functions in the statistical category. Here are the ones (10) that you will use more often. 
Functions  What it Does 
AVERAGE  Returns the average of its arguments 
AVERAGEA  Returns the average of its arguments, including numbers, text, and logical values 
COUNT  Counts how many numbers are in the list of arguments 
COUNTA  Counts how many values are in the list of arguments 
COUNTIF  Counts the number of nonblank cells within a range that meet the given criteria 
MAX  Returns the maximum value in a list of arguments 
MAXA  Returns the maximum value in a list of arguments, including numbers, text, and logical values 
MIN  Returns the minimum value in a list of arguments 
MINA  Returns the smallest value in a list of arguments, including numbers, text, and logical values 
RANK  Returns the rank of a number in a list of numbers 
LARGE  Returns the kth largest value in a data set 
SMALL  Returns the kth smallest value in a data set 
MAX, MAXA, MIN and MINA =MIN(A1:A5) will return the smallest value in the range A1 to A5. Arguments can be separated with a colon or with commas if the cells or ranges are not contiguous like in =MIN(A1,A2,A4,A5) or =MIN(A1,A2,A4:A5). MAX in an interesting functions to highlight the latest date within a range but make sure that the format of the cell where you use MIN or MAX is ''Date''. LARGE, SMALL And what if you want the second or third largest value or the second smallest value. Use LARGE and SMALL like this: As a matter of facts you can forget about MIN and MAX with: 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 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. 
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Excel Statistical Functions and Formulas