The absolute value of the t stat (2.568) is > than the 'two tailed' t critical value (2.131), and indicates that the results for treatment #1 are indeed different to those from #2. The t-stat sign (-) indicates that the #1 mean is smaller than the #2 mean and that the difference is significant, since the t stat value > the 'one tailed; t critical value (2.6568 compared to 1.75305). the p values are a measure of the reliability of these parameters. p values of 0.05 indicate that there is a 95% confidence level that the t stat value does not occur by chance. here the p values indicate much higher levels of confidence can be placed in the t test values obtained.