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

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter9: Sequences, Probability And Counting Theory
Section9.7: Probability
Problem 1SE: What term is used to express the likelihood of an event occurring? Are there restrictions on its...
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Last year, the average math SAT score for students at one school was 475.  The headmaster introduced new teaching methods hoping to improve scores.  This year, the mean SAT score for a sample of students was 481.  Is there statistically significant evidence that the new teaching method is effective?  If the teaching method had no effect, there would be roughly a 3 in 10 chance of seeing such an increase.  Does the result have statistical significance? Why or why not? Does the result have practical significance?

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