notice that table does not have a line for the degrees of freedom within equal to 76
in fact, whole ranges of values are skipped after the first 30
this is because the critical score do not decrease very much for incremental increases in the degrees of freedom after 30 where we have degrees of freedom that do not appear in the table we refer to the closest value that appears in the table below the desired number Here the closest value below 76 that appears in the table is 60 Thus the critical value in this instance for F is 2.52 We reject the null hypothesis of no difference if the sample value for F is greater than the critical value