Bell Curve Problem

[Anil_Babu_Samineni]

Hello,

I am trying to create one bell curve chart.

Can you please help me this. Almost done i mess something.

I followed the  Henric Cronström. Please help me guys.

The graph indicates

X-Axis --> Score

Y-Axis --> is Avg(Score) for bell curve

I want to show only Y-Axis with Auto generated like 0-100 values.

Please help me..

[sunny_talwar]

Are you sure your data follow normal distribution? Henric's example uses NormInv() function to create a normal curve.

[Anil_Babu_Samineni]

Sunny,

I don;t know about that. That's why i posted here. I am new to Bell curve.

Can you please help me on this.

[vikramv]

Not sure , Whether you are looking for something like the attached one ??

[Anil_Babu_Samineni]

Similar to that,

Some changes required

1) X-Axis should be score

2) Y-Axis is normal distribution from 0 to 100

3) Then expression is similar to Avg(Score, [Normal distribution])  like Bell curve which i show the image beside of my image.

- Anil

[vikramv]

You have the data which have scores more than 1000 ....

So If we limit the data in you chart to <= 100 , we can see the possible bell curve as far as I know is attached.

[Anil_Babu_Samineni]

Vikram,

Yes - Here the curve showing horizontal. How to change this line chart into Vertical. But, i don;t want to effect dim and Expre.

Nice Article.

[hic]

If you only select the values around the average, it looks like a normal distribution. But you have outliers, so without this selection it doesn't look as good.

HIC

[Anil_Babu_Samineni]

Henric,

Thanks for your response. Here, i want to exclude two values which is from different field. And meantime, Client want to show Y-Axis from 0 to 100 only.

And in my score which mean X-Axis, i have up to 100 only. So, how to achieve this.

I am expecting O/P like this. This graph i created in excel. Is that is possible?

[hic]

If you want something like my diagram, but limited to scores under 100, you should use something like

     Round([Score],BinWidth)

as dimension, and

     Count ({$<[Score]={"<110"}>} [Score])

as measure for the bars. Then you can add a Normal distribution using e.g.

     Only({$<[Score]={"<110"}>} Normdist(Round([Score],BinWidth),Avg({$<[Score]={"<110"}>} total [Score]),Stdev({$<[Score]={"<110"}>} total [Score]), 0)) * BinWidth * Count({$<[Score]={"<110"}>}total [Score])

Binwidth could be 10 or 20 or something like that.

I don't understand your graph. What do the y-values correspond to?

HIC