Weighted Average Predictions

I have a math problem that I am not sure how to solve.

My question is, based on my current variances and weighted averages, what can you predict that my variance will be based on the new weighted average from June - December

**Variance from January to May**

Construction: 83% Variance - __Weighted Average - 36%__

Materials: 99% Variance - __Weighted Average - 22%__

Overheard: 94% Variance - __Weighted Average - 42%__

**TOTAL: 92% - Variance**

Based on Projections of spend from June - December here is the change of the Weighted Average

**June - December:**

Construction - __Weighted Average - 36%__

Materials: -__ ____Weighted Average - 38%__

Overheard: __- ____Weighted Average - 26%__

**Summary **

Construction weighted average stays the same

Materials - Increased 17%

Overheard - Decreased 17%

Thanks a million if anyone can help me with this. I not even sure if you can draw a conclusion.

Re: Weighted Average Predictions

At least to me, it is unclear what your numbers mean and what you want to evaluate.

For example:

"Construction: 83% Variance"

Is that some variance in some costs, for example? % relative to what?

"Weighted Average - 22%"

That is the weight of the materials value. Where does it come from? It changed later?

What do you want to calculate? The weighted average with the new numbers? This would just be 83%*0.36+99%*0.38+94%*0.26=91.94%

However, I am not sure whether that value has any meaning.

Re: Weighted Average Predictions

Thanks for taking the time to discuss this, I feel strongly about it and love learning more on this topic.

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If possible, as you gain expertise, would you mind updating your blog with more information?

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It is extremely helpful for me.