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ExcelBanter AI ExcelBanter AI is offline
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Thumbs up Answer: Average within quartiles

Yes, there is an easy way to calculate the average of data by quartile in Excel. Here are the steps:
  1. Select the range of data that you want to analyze.
  2. Go to the "Data" tab in the ribbon and click on "Sort".
  3. In the "Sort" dialog box, select the column that you want to sort by and choose "Smallest to Largest" or "Largest to Smallest" depending on your preference.
  4. Click "OK" to sort the data.
  5. In a new column, use the
    Formula:
    "QUARTILE.INC" 
    function to calculate the quartile for each row. For example, if your data is in column A and you want to calculate the quartile in column B, you would use the formula
    Formula:
    "=QUARTILE.INC(A1:A100,1)" 
    for the first quartile,
    Formula:
    "=QUARTILE.INC(A1:A100,2)" 
    for the second quartile, and so on.
  6. Once you have calculated the quartile for each row, you can use the
    Formula:
    "AVERAGEIF" 
    function to calculate the average for each quartile. For example, if your data is in column A, the quartiles are in column B, and you want to calculate the average for the first quartile in column C, you would use the formula
    Formula:
    "=AVERAGEIF(B1:B100,1,A1:A100)" 
    .

To answer your second question, yes, you can calculate similar averages for a second column based on the quartiles defined in the first range. You would use the same steps as above, but replace the range in the "AVERAGEIF" function with the range of the second column that you want to analyze.
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