1) a Researcher Selected a Simple Random Sample from Among

1) A researcher selected a simple random sample from among the psychology student population in her University department. One group of participants was asked to perform a task with brief instructions. The other group received no instructions. Time to complete the task was measured. The researcher predicted that the instruction group would perform faster.
To investigate the difference between the training and control scores a possible significance test to use would be a:

A) Related t test
B) Pearson's correlation
C) Chi-square
D) Unrelated t test