Weighted Percentile Calculation Help

Welcome to the forum!

Will you please attach a sample Excel workbook? We are not able to work with or manipulate a picture of one.

1. Make sure that your sample data are REPRESENTATIVE of your real data. The use of unrepresentative data is very frustrating and can lead to long delays in reaching a solution.

2. Make sure that your desired solution is also shown (mock up the results manually).

3. Make sure that all confidential data is removed or replaced with dummy data first (e.g. names, addresses, E-mails, etc.).

4. Try to avoid using merged cells as they cause lots of problems.

Unfortunately the attachment icon doesn't work at the moment, so to attach an Excel file you have to do the following: just before posting, scroll down to Go Advanced and then scroll down to Manage Attachments. Now follow the instructions at the top of that screen.

Please pay particular attention to point 2 (above): without an idea of your intended outcomes, it is often very difficult to offer appropriate advice.

Here is a formula that will 'transform the data set so that you can do a basic PERCENTILE.INC calc', assuming that the list was supposed to have had 289 listed once and 204 listed twice as indicated by the quantities in column C:

Formula:

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Very impressive, JeteMC, I nearly have it!

I am running into a problem as I rewrote the formula to a larger data set. Any idea why on this formula stops working at row 38 and starts producing repeating values?

EDIT: I see the problem with the formula, though not quite sure how to fix. When there is a repeated value in column C, it throws off the COUNTIFS and INDEX(MATCH formulas and references the first instance of the repeated value.

Thanks so much for the help!

The formula in column H, which has become a helper column and could be moved/hidden for aesthetic purposes, has been modified to INDEX the item numbers as those don't repeat:

Formula:

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A formula now populates column I with the values:

Formula:

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The percentile formulas now reference column I (I also modified them to reference column J instead of hard coding in the percentiles, which gives the user the ability to easily change):

Formula:

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Let us know if you have any questions.

You're Welcome a bunch. Thank You for the feedback and for marking the thread as 'Solved'. I hope that you have a blessed day.

Administrative Note:

Hello carofranes and Welcome Excel Forum.

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