SHOW ALL WORK FOR CREDIT A) Good Luck to: yasmin x-mean Formulas: z standard deviation Velasques Procedure for finding percentile from data value: 1) use z score formula to find z score 2) Look up percentile value on table and follow rules below: a) Less Than: table value b) Greater Than: 1- table value c) Between: Larger table value - smaller table value Procedure for finding a data value from a percentile: 1. Look up percentile and find z-score 2. Use z score formula and solve for x 34 34 13.5 13.5 25 2.5 The weights of a species of insect follow a Normal distribution with mean 80 grams and standard deviation 3 grams. (5 points) 1. Label the graph using info above. TIGUD ale to age 71 74 77 80 83 86 89 (2 points) 2) About what percent of the insects have weights between 77 86 grams? 34 +34 +13.5 = 81.5% grams and (2 points) 3) Above what weight are the largest 16% percent of these insects? ad 630