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Produce random number using normal distribution
I have a csv File that looks like :
I have another file where I need to generate data this way for each subject above :
For example for the subject MathMark the corresponding table should be :
For example for the subject EnglishMark the corresponding table should be :
want to produce NumberofExams random numbers with normal distribution (with WeightedAverage, WeightedStandardDev) . How can I get these informations from another csv and calculate the wanted random numbers in Excel . Any formula or Macro is welcomed
subjects, WeightedAverage, WeightedStandardDev, NumberofExams,
MathMark, 1.5, 0.2, 5,
PhysicMark, 1.6, 0.4, 10,
EnglishMark, 3, 1.2, 8,
PhiloMark, 8.2, 1.5, 9,
Others 9.2, 3.2, 5, I have another file where I need to generate data this way for each subject above :
For example for the subject MathMark the corresponding table should be :
NumberofExams Mark 1 =NORMINV(RAND(),WeightedAverage=1.5,WeightedStandardDev=0.2)
2 =NORMINV(RAND(),WeightedAverage=1.5,WeightedStandardDev=0.2)
3 =NORMINV(RAND(),WeightedAverage=1.5,WeightedStandardDev=0.2)
4 =NORMINV(RAND(),WeightedAverage=1.5,WeightedStandardDev=0.2)
5 =NORMINV(RAND(),WeightedAverage=1.5,WeightedStandardDev=0.2)For example for the subject EnglishMark the corresponding table should be :
NumberofExams Mark
1 =NORMINV(RAND(),WeightedAverage=3,WeightedStandardDev=1.2) 2 =NORMINV(RAND(),WeightedAverage=3,WeightedStandardDev=1.2) 3 =NORMINV(RAND(),WeightedAverage=3,WeightedStandardDev=1.2)
4 =NORMINV(RAND(),WeightedAverage=3,WeightedStandardDev=1.2)
5 =NORMINV(RAND(),WeightedAverage=3,WeightedStandardDev=1.2)
6 =NORMINV(RAND(),WeightedAverage=3,WeightedStandardDev=1.2)
7 =NORMINV(RAND(),WeightedAverage=3,WeightedStandardDev=1.2)
8 =NORMINV(RAND(),WeightedAverage=3,WeightedStandardDev=1.2)want to produce NumberofExams random numbers with normal distribution (with WeightedAverage, WeightedStandardDev) . How can I get these informations from another csv and calculate the wanted random numbers in Excel . Any formula or Macro is welcomed
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ASKER
@Fred Marshall YEAH IT S just a specification not a correct a formula , a way to generate a random value depending on a normal distribution of a couple of <average,stdev> that should be extracted from other file (csv)
ASKER
@Martin Liss how can I add this macro using excel 2010 ?
In Excel, Press Alt+F11 to open the Visual Basic Editor (VBE)
Right-click on your workbook name in the "Project-VBAProject" pane (at the top left corner of the editor window). If you don’t see an existing module then select Insert -> Module from the context menu. Otherwise just select the module.
Copy the macro (you can use the ‘Select All’ button if you like) and paste it into the right-hand pane of the VBA editor ("Module1" window)
Press Alt+F11 again to go back to Excel
Optionally, press Alt+F8 to open the "Macro" dialog window. Select the macro, click ‘Options…’, hold down the Shift key and type the letter A (or any other letter) and click ‘OK’. Then anytime you want to run the macro press Ctrl+Shift+A.
When you close the workbook you will need to save it as an xlsm or xls file if it’s not already one of those.
Right-click on your workbook name in the "Project-VBAProject" pane (at the top left corner of the editor window). If you don’t see an existing module then select Insert -> Module from the context menu. Otherwise just select the module.
Copy the macro (you can use the ‘Select All’ button if you like) and paste it into the right-hand pane of the VBA editor ("Module1" window)
Press Alt+F11 again to go back to Excel
Optionally, press Alt+F8 to open the "Macro" dialog window. Select the macro, click ‘Options…’, hold down the Shift key and type the letter A (or any other letter) and click ‘OK’. Then anytime you want to run the macro press Ctrl+Shift+A.
When you close the workbook you will need to save it as an xlsm or xls file if it’s not already one of those.
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
It appears to be Excel but it isn't. Perhaps it's just a bit too terse.
For example:
What is this?:
=NORMINV(RAND(),WeightedAv
It's not an Excel formula or even a set of them separated by commas.
So, what is it? A specification? Pretty slim specification.....