Last year, the average math SAT score for students at one school was 775. The headmaster introduced new teaching methods hoping to improve scores. This year, the mean math SAT score for a sample of students was 1178.

If the teaching method had no effect, there would be roughly a 3 in 100 chance of seeing such an increase.

Does the result have statistical significance?

Does the result have practical significance?

Group of answer choices

a. The result has both practical significance and statistical significance

b. The result has practical significance but does not have statistical significance

c. The result has statistical significance but does not have practical significance

d. The result has no practical significance and no statistical significance