A neuroscientist gives a sample of n = 100 participants an attention test at the beginning of the month. He believes participants will score much differently at the end of the month. To evaluate the changes that occur, participants are tested again at the end of the month. Their test scores revealed a mean difference of M_D = 4.34 points.

Round to the third decimal whenever necessary.

1. State your hypotheses
2. If s² = 100, are the results sufficient to conclude that there is a significant difference? Use a two-tailed test with = .05. Please specify (1) the t statistic, (2) the boundaries of the critical region, (3) state your decision. Show your computations

c. Computer²

d. Write up your results in a sentence as you would for a research paper