Number of Participants 12 4 score on a 145 130 50 110 Psychology test 78 155 38 12 7 39.5 49.5 59.5 69.5 79.5 89.5 99.5 109.5 119.5 129.5 139.5 149.5 159.5 169.5 Score (in Points) 1) The class width = 10 6) The shape of the distribution: skewed right 2) 3) Minimum score = 40 points Maximum between 160 and 170 Mean = standard deviation variance. ? 2