What kind of descriptive statistics should students know for the AP Psychology Exam?
Students should have a fundamental understanding of descriptive statistics. They should be aware of the measures of central tendency (mean, median, and mode), including procedures for their computation. Students should be able to recognize both positively skewed and negatively skewed distributions. Students should have knowledge of positive and negative correlation and understand that while correlation does not preclude causation, it does not allow for inferences of causation. Students should be aware of measures of variability, such as range and standard deviation, and understand what these concepts mean. Although students will not have to do any involved calculations on the AP Psychology Exam, they should be able to look at sets of scores and determine which has the greatest or least standard deviation or range.
