# Thread: How to transform non-normal variable to normal distrubtion ?

1. ## How to transform non-normal variable to normal distrubtion ?

Hello
Good morning,

Can you please give me a way to transform non-normal variable in SPSS to normal distributions?

We try LG10(DATA) as well as LN(DATA) and output still not normal.

2. ## Re: How to transform non-normal variable to normal distrubtion ?

Given that histogram there is no transformation that will make it normal. It appears to be bimodal.

3. ## Re: How to transform non-normal variable to normal distrubtion ?

Why do you need it to be normal? There are many nonparametric statistics out there that can be used in lieu of traditional parametric procedures.

4. ## Re: How to transform non-normal variable to normal distrubtion ?

If my graph looks like normal distributions but when I calculate the skewness /SE it give me -2,-4,-5 thats mean what ?
I use this method after I run factor analysis, what should I do ?!

5. ## Re: How to transform non-normal variable to normal distrubtion ?

What should you do about what? What are you trying to do?

6. ## Re: How to transform non-normal variable to normal distrubtion ?

Ok I check out your topic about asking a good question , Ok my problem is I used smartPLS at first when I though my data is not normal , after I show my graphs to my professor in college using SPSS, he told me my data is normal distributions and I should use SPSS in this case. anyway I was using both and sample size = 211 , 4 dependent variables , 15 independent variables.

The Question is since I show my professor the graphs and he told me all my data is normal except one variable which is not normal, anyway I went over this variable and try to convert it to normal using LN,LG,SQRT but I wasn't successful and still not normal. The method here I used is Skweness / SE and then check the value if it is reside -1.96 or +1.96

After that I went checking all the variables I found they are not normal using this method of division skweness/SE
Is there a way to convert my one variable to normal ? if not is there another number I can get from any analysis will show if my data normal or not maybe skweness not reliable method !

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