25 20 - B 15 - Frequency C 10 - 5 A 10 15 20 25 30 Measurement 1. What is the approximate value of the mean in each case: 1. A 2. B 3. C 2. Which curve has the smallest variability? 3. Which is better to describe the variability of scores on a curve: standard deviation or variance? Why? 4. Which measure of central tendency is radically affected by outlier scores