An old myth claims that boys are better at math than girls. A high school guidance counselor collects the math grades from a random sample of 50 boys and another random sample of 50 girls. The guidance counselor then tested the hypothesis H₀: µ₁ - µ₂ = 0 against the one-tail alternative and found P = 0.35.Which is true?
A) The boys' grades are 35% higher than the girls' grades.
B) There's a 35% chance another study will give these same results.
C) There's a 35% chance that boys have higher math grades than girls.
D) None of these.
E) There's a 35% chance that there''s really no difference in math grades.

Question

Quizplus · Accepted Answer

The p-value of 0.35 indicates the probability of observing the data (or something more extreme) assuming the null hypothesis is true. It does not indicate the probability of the null hypothesis being true, nor does it measure the magnitude of the difference between groups.

An Old Myth Claims That Boys Are Better at Math