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Hypothesis testing

The following are the GMAT scores and the GPA's of a random sample of 6 students in a graduate school.
During a 'cram' weekend the students learned several GMAT applications. With a 0.05 los did the GPAs increase?
BEFORE AFTER
GMAT GPA GPA
610 3.60 3.70
470 3.25 3.30
590 3.50 3.45
520 3.20 3.15
410 3.00 3.10
750 4.00 3.95
Mean = 3.43 3.44
Stdev = 0.35 0.33

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