how to calculate standard error of difference how to calculate t value from average how to find standard error of difference in paired t what is the error of difference in paired t test? how to calculate the standard error of difference with paired t test what is t value in paired t test what's the standard e value of the puzzle? standard error of difference formula how to find the standard error of variance (sd) of the paired t-test what is the standard error of the value of the t value in the square how to find sd what is paired t test and p value? average time required to complete a puzzle with alcohol standard error of difference when does sd change what is the standard error of the paired t test? a standard error of difference paired t test paired t test for puzzles average time to solve an average puzzle what's the difference between the standard error of difference and the average completion time of the puzzle?