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is there any free statistics programs that complete the calculations for you?

I can identify the the correct values for the formulas but sometimes miscalculate the answers.  Is there any online websites that you can click on the corresponding formula and fill in the values and it do the calculations?
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3 Answers

One commonly used statistics package is called R. The upside is that it is free and that it is incredibly versatile and can handle even very complex statistics. The downside is that it can be a little dependent on writing out syntax and code... though this is definitely less of a problem with the simple statistics. You can find out more here: http://www.r-project.org/ ;
 
Again R can "feel" a bit strange at first but there are a number of good sites that can help you get the right code down for the simpler statistical tests. Here is one support site that I have referred to a good deal myself: http://www.statmethods.net/
 
Finally, if you have access to Microsoft Excel you might be surprised to find out that it can compute various statistics like chi-square, t-tests, F-tests, variance, standard deviations, means, and even more. You can find all of the options under formulas -> More options -> Statistical
 
I hope those options help. 
R is extremely powerful, but can be challenging to learn if you are just getting started. Yet another alternative is Calc, which is part of the free open-source LibreOffice suite which you can download from their website. While you would have to learn which Calc functions to use to check your results, the functions are very similar to those implemented by Microsoft Excel, so any time you spent learning to use them may pay off in the future if you work somewhere where they use Excel.