This tool generates a table of Student's t values at a critical p-value, pcritic = α, and up to a maximum number of degrees of freedom, υmax.
Just submit a pair of pcritic and υmax values.
The tool comes handy when you don't have statistical t-tables around or are working with p and t values, or degrees of freedom, not available from such tables. Avoid pausing a problem for annoying linear interpolation workarounds!
A math teacher hypothesizes that students who are allowed to play chess two hours daily will not score significantly lower than students allowed to play chess for four hours on a trigonometry quiz. He randomly assigns 20 students to one of two groups. In one group he has students to play for two hours and in the other group he has them play four. An hour later he gives them a 10-point quiz. Group results are given below: