I don't understand assignment, please assist.

Independent Samples T-test

1.An investigator predicts that students taking an achievement test in the morning will perform differently than students taking the same test in the afternoon.Eight students are assigned to take the test in the morning and 8 students are assigned to take the test in the afternoon.Run an independent samples t-test and summarize findings using an alpha level of .05, two-tailed. Also contruct a bar graph to graphically represent your results.

Morning Group: 25, 31, 44, 36, 29, 42, 39, 41

Afternoon Group: 22, 25, 24, 27, 33, 28, 31, 34