Determine the probability of the treatment group's mean being lower than the control group's mean by 15 points or more. Then complete the statements.

The significance level is set at 5%, and the probability of the result is
a)7.8%
b)7.7%
c)9.2%
d)4.6%
e)5%

which is
a) the same as
b) less than
c) greater than

the significance level. The result is
a) not statistically significant
b) statistically significant
c) inconclusive