Weighting a Trimmed Data Set

cmfuld

New Member
Joined
Mar 8, 2006
Messages
11
Office Version
  1. 365
Platform
  1. Windows
Trying to do a forecast. I want to take the most recent 8 weeks and trim out the highest and lowest value. This would give me 6 weeks of data. Most recent two weeks would be weighted at 25%, middle two weeks would be weighted at 15% and oldest two weeks would be at 10%.

We tried to do the forecast with the Trim Mean formula, which would drop the high and low value, but this gives equal weighted to each of the six weeks.

We believe that weighting the stores will show us changes in the business sooner.

In the example below, I got the weighted average, but I had to manually take out the mIn and Max from my data set. I need to figure out a way to do this with a formula or a set of formulas.

2023​
2023​
2023​
2023​
2023​
2023​
2023​
2023​
10%​
10%​
15%​
15%​
25%​
25%​
Wk5Wk6Wk7Wk8Wk9Wk10Wk11Wk12Trim MeanMinMaxWgt Avg
36316​
55%
13%
19%​
33%​
22%​
22%​
45%​
22%​
27.1%​
13%​
55%​
19%​
33%​
22%​
22%​
45%​
22%​
28.5%​
36536​
13%​
17%​
27%​
29%
-3%
19%​
18%​
10%​
17.2%​
-3%​
29%​
13%​
17%​
27%​
19%​
18%​
10%​
16.8%​
36571​
5%​
-2%​
-4%​
-5%
6%
-1%​
-3%​
-4%​
-1.5%​
-5%​
6%​
5%​
-2%​
-4%​
-1%​
-3%​
-4%​
-2.2%​
 

Excel Facts

Lock one reference in a formula
Need 1 part of a formula to always point to the same range? use $ signs: $V$2:$Z$99 will always point to V2:Z99, even after copying

Forum statistics

Threads
1,213,546
Messages
6,114,251
Members
448,556
Latest member
peterhess2002

We've detected that you are using an adblocker.

We have a great community of people providing Excel help here, but the hosting costs are enormous. You can help keep this site running by allowing ads on MrExcel.com.
Allow Ads at MrExcel

Which adblocker are you using?

Disable AdBlock

Follow these easy steps to disable AdBlock

1)Click on the icon in the browser’s toolbar.
2)Click on the icon in the browser’s toolbar.
2)Click on the "Pause on this site" option.
Go back

Disable AdBlock Plus

Follow these easy steps to disable AdBlock Plus

1)Click on the icon in the browser’s toolbar.
2)Click on the toggle to disable it for "mrexcel.com".
Go back

Disable uBlock Origin

Follow these easy steps to disable uBlock Origin

1)Click on the icon in the browser’s toolbar.
2)Click on the "Power" button.
3)Click on the "Refresh" button.
Go back

Disable uBlock

Follow these easy steps to disable uBlock

1)Click on the icon in the browser’s toolbar.
2)Click on the "Power" button.
3)Click on the "Refresh" button.
Go back
Back
Top