PSY 1167 Study Guide - Midterm Guide: Interquartile Range, Standard Deviation, Normal Distribution
11 Mar 2014
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Stat exam 2 study guide: variability: tells us how much scores vary from the mean (the greater sd, the greater variability) 2 different data sets can have the same mean but different levels of variability (if data on a graph is more clustered or far apart: range: the difference between the largest and smallest scores. Iqr is less likely to be affected by outliers compared to range: sd is easier to understand than variance because by taking the square root, it returns the measure back to its original level. 68% of scores will fall within one standard deviation of the mean. Peak of the curve represents average score of the mean. The mean, median and mode are all the same. The sd determines how narrow or broad the curve is (because how close together or far apart scores are from the mean) Look at graph in ppt (largest or smallest mean and sd)
