Use geogebra.org/cas to access statistical procedures:  GOODNESS OF FIT  

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 1. Go to:   https://www.geogebra.org/cas
2.  When page opens, click on icon at top right below the search icon.  A line of options appears.
3.  Click on the dots, and select probability calculator.
4.  Click on the STATISTICS tab.
5.  Pull down the menu in the procedures box, and select GOODNESS OF FIT.
6.  Select the correct number of rows, and then enter your data.
7.  The results of the GOF test appear below the data, including test statistic, p-value, and df.