basic statistics for the behavioral sciences
posted by jan on .
(a)on a normal distribution of exam scored, poindexter scored at the 10th percentile, so he claims that he outperformed 90% of his class. Why is he correct or incorrect? Because Foofy's score is in a tail of the distribution, she claims she had one of the highest scores on the exam. Why is she correct or incorrect?
10th percentile means you scored equal to or better than 10% os the scores. 90% scored better than Foofy. She is in the wrong tail.
(A) Wrong. 10th percentile means the lowest 10% of the class
(B) Neither right nor wrong. It depends on which tail end the scores fall upon