regular exercise no regular exercise

sample size 25 25

Average score 132 121 SD of scores 25 25

Suppose the null hypothesis is that regular exercise does not help to maintain mental ability among the faculty members aged 40 to 50, and the alternate hypothesis is that it does. The I I P-level of the appropriate statistical test is closest to

a. 5%

b. 3%

c. .002%

d. .001% e. 1%