George scored 85% on an exam. Did George do better than 90% of his classmates on the test?
1) The mean score on the test was 80%.
2) The stardard deviation is 2.
I understand that George's score is 2.5 deviations above the mean. How does that give me any information as to how his classmates did?
On the explanation, it notes that George did better than 95% of his classmates. Please explain.![]()
1) The mean score on the test was 80%.
2) The stardard deviation is 2.
I understand that George's score is 2.5 deviations above the mean. How does that give me any information as to how his classmates did?
On the explanation, it notes that George did better than 95% of his classmates. Please explain.