We strongly recommend using a proper statistical software (SPSS, Stata, SAS, R, Jamovi, JMP) for analysis instead. Those softwares prevent you from doing inappropriate things, and make it easy to do the correct calculation.
Online calculators (ex. vassarstats.net ), in which you can copy and paste your data can also work .
Mason has academic site licenses for SPSS and SAS and has purchased lab licenses (allowing coursework) for Stata. SPSS and SAS are on all ITU computers, and all three are accessible through the Virtual Computing Lab (VCL). From feedback, Stata seems to work reasonably well through the VCL, after the initial learning curve. However, there are frequent complaints about SPSS being slow and being difficult to work with given multiple windows.