Hi, I got some data and I want to draw the probability distribution of that data. I searched everywhere but all I could find was how to draw a normal distribution. But my data is not normally distributed.Is there any way that I could draw the probability distribution of this data using Microsoft Excel 2010 ? Do I have to draw a histogram first? Then how? Help please!
Thanks in advance
PUH
Last edited by PUH; 01-16-2012 at 11:04 PM.
Hi PUH,
Welcome to the forum.
Share the sample data along with expected results for forum to give a quick try.
Regards,
DILIPandey
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DILIPandey, Excel rMVP
+919810929744 (India), +971528225509 (Dubai), dilipandey@gmail.com
Hi, Thanks for coming forward to help me. Here's my data.
0.83 0.73 0.83
1.14 0.80 1.19
0.83 1.22 1.08
1.13 0.90 0.96
1.07 0.83 0.75
1.38 1.47 0.52
0.71 0.85 1.16
0.64 1.06 0.43
0.79 0.74 1.18
1.25 1.13 1.02
It's just a bunch of figures, that's all. This separation into three piles is not of any meaning. Just for clarity.
The output should be a plot like this
I cannot really give you the real expected output because I don't have any other means of drawing that graph.
Well, I know this is not much of a help to help me. All what I can tell is how it's done manually.
You first break this data into few ranges (e.g. 0 - 0.1, 0.2 - 0.4 etc.) and count the numbers of data points that belong to each range. Then you plot these numbers (frequencies) against the ranges and smooth out the curve. (which is a very tedious, if not impossible) thing to do by hand.
Hope you can help me, thank you.
Last edited by PUH; 01-15-2012 at 10:18 AM.
Hi PUH,
Basis your data, I have created a chart in the attached file. Go through it and suggest further changes, if any. Thanks.
Regards,
DILIPandey
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Oopps.. missed the attachment.
Now re-attached.
Regards,
DILIPandey
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Thank you very much for the help. This is almost exactly what I wanted.I'm extremely sorry I forgot something. All the frequency values should be divided by the total number of instances (30 here) since the probability cannot exceed 1. Sorry I forgot to mention that. When I tried to change that, it gives me the error 'you cannot change the part of an array'. Except that the only change needed is that the graph should be a smooth one. I did that little bit, changing the graph type to 'X Y scatter smooth' did the trick.
I'd love if you could explain how you did it too.
Many thanks again.
PUH
You are welcome PUH..
Included the "division with 30" part in the attached part.
To understand this, would recommend you to learn Frequency function in detail along with some array logic, using which this solution has been developed.
Cheers
Regards,
DILIPandey
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Guess it's my homework! Thanks and sorry for bothering you. Many thanks again. I'm marking this as solvedTo understand this, would recommend you to learn Frequency function in detail along with some array logic, using which this solution has been developed.
Last edited by PUH; 01-16-2012 at 10:55 PM.
Hi PUH,
Its not bothering rather learning for me as I have done this for first time.
Thanks for sharing such a nice query.
Regards,
DILIPandey
<click on below star if this helps>
i try to adapt the attached excel for my data, how come it always says "you cannot change the part of an array"...
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