Last year, the average math SAT score for students at one school was 475. New teaching methods were introduced to hopefully improve the scores. This year, the mean math SAT score for a sample of students was 481. If the teaching method had no effect, there would be a roughly 3 out of 10 chance of seeing such an increase. Is there statistically significant evidence that the new teaching method is effective? Does the result have practical significance? Explain why or why not for both your answers.

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