The carcinoembryonic antigen (CEA) test measures the amount of this protein that may appear in the blood of some people who have certain kinds of cancers, especially cancer of the large intestine (colon and rectal cancer).
In this INDEX / MATCH example, the MATCH function will find the position of Jacket in column B, and the INDEX function will return the code from the same position in column A. Set up the worksheet as shown at right. Enter the following formula in cell B6: =INDEX($A$2:$A$4,MATCH(A6,$B$2:$B$4,0))
When using the AVERAGE function in combination with INDEX MATCH, most often you would enter either 1 or -1 in the third argument (match_type) of the MATCH function, unless you are certain that your lookup array contains a value exactly equal to the average. If latter, you can enter 0 for exact match.