In a time and motion study, It was found that a certain manual work can be finished at an average time of 40 minutes with the standard deviation of 8 minutes. A group of 16 students is given s special training and then found to average only 35 minutes. Can we consider that the special training can speed up the work using 0.01 level?

Tabular value of T?

What statistical tools to be used?

What is the value T-test?