Calculate Mean using Measure

[supriyad]

Hi all,
I want to calculate the mean for following values shows in picture.

I am filtering data Using Program Manager Name. 

I used following measure to calculate mean :

Mean = CALCULATE(AVERAGE(' Project Rank'[Score]))

But it giving me wrong values...same thing happen with my Standard deviation measure.

I need to calculate Zscore using this.
Plz suggest me regarding above,

[quentin_vigne]

Hi @supriyad

You want the mean per Month & Year or per Project ID for each line ? 

What I want to know is : What result do you expect from your Mean column ? 

- Quentin

[supriyad]

Hi @quentin_vigne

I have added expected mean column in my table.

I need Project wise Zscore in that particuler Month Year

[quentin_vigne]

@supriyad

What is the formula that you used for you expected mean? (Like what is the calculation you need me to translate to dax)

- Quentin

[supriyad]

@quentin_vigne Currently I calculated Expected mean values manually to show you..

But I am expecteing My measure should give me values like this..

[quentin_vigne]

@supriyad

Yes but how did you calculated them manually ? 

- Quentin

[supriyad]

@quentin_vigne

Suppose Project 1 having score 3 then mean should 3/11 i.e total count of projects according to Month Year.

[quentin_vigne · Accepted solution]

@supriyad

I see now.

What you want is this : 

Mean2 = DIVIDE('Project Rank'[Score];CALCULATE(COUNT('Project Rank'[Score]);ALL('Project Rank')))

(Isn't your mean supposed to be more something like 'Score / Total of score' ? It just seems strange that you divide the score by the count of your table ... Maybe it's just me and I'm stupid today ahah)

If it worked, don't forget to mark your topic as solved

- Quentin