# Function to compute average without high and low values

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##### SUMMARY
For statistical purposes, you may want to calculate the average of a sampleexcluding its highest and lowest values. In Microsoft Excel, you can createthe following formula to calculate an average after excluding the highestand lowest values:
``   =(SUM(region)-MAX(region)-MIN(region))/(COUNT(region)-2)				``
NOTE: You must include the parentheses the way they appear in the aboveformula so that the function is computed in the right order.
Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific requirements. Following is a sample Microsoft Visual Basic for Applications functionthat incorporates the formula described in the "Summary" section of thisarticle.

### Sample Visual Basic procedure

``   Function HiLoAverage(region) As Variant      With Application         HiLoAverage = (.Sum(region) - .Max(region) - .Min(region)) / _            (.Count(region) - 2)      End With   End Function				``
##### REFERENCES
"Visual Basic Language Reference," version 3.0, page 231

"Visual Basic User's Guide," version 5.0, pages 50-51

### Microsoft Excel 97 and Microsoft Excel 98

For more information about using custom functions, click the Indextab/button in Microsoft Excel 97 Help or MS Excel Help, type the followingtext
functions, overview
and then double-click the selected text to go to the "About user-definedfunctions" topic.

### Microsoft Excel 7.0

For more information about using custom functions, click the Index tab inMicrosoft Excel 7.0 Help, type the following text
functions, user-defined
and then double-click the selected text to go to the "Writing a user-defined worksheet function" topic.