PTK Quiz questions and answers already passed

Suppose a student received a raw score of 41 which corresponded to the 67th percentile. What does this information mean to the teacher? 67% of the students who took this same exam earned a raw score of 41 or less. A percentile is the value or score on the ordered array of data that indicates the percentage of the scores that fall at or below that value. The third quartile establishes the point where 75% of the score are below it. Therefore, at the 67th percentile, this student did not score above the third quartile. Which of the following measures of central tendency is MOST strongly influenced by extreme scores? The correct answer is A. The mean is most greatly influenced by extreme scores. Given a normal distribution of student scores, what percentage of the scores will fall within two standard deviations of the mean? 95% of the data points will fall between two standard deviations of the mean. 68%, shows the percentage of data points that will fall within one standard deviation of the mean. Choice A is incorrect because the standard deviation includes the area on both sides of the mean. Which of the following BEST describes what a Pearson coefficient of zero between scores on two tests would indicate to a teacher? The scores on the two tests are ... A Pearson coefficient of zero indicates that the scores on the two tests are not related in a reliable or predictable way.