What percent of a standard Normal model is found in each region? Draw a picture first. a) z > - 1.2 b) z - 1.2. O A. CB. O C. O D. a X X X X -1.2 -1.2 -1.2 -1.2 Find the percent of the area to the right of z = - 1.2. % (Round to two decimal places as needed.)A particular IQ test is standardized to a Normal model, with a mean of 100 and a standard deviation of 17. a) Choose the model for these IQ scores that correctly shows what the 68-95-99./ rule predicts about the scores. O A. O B. &C. LI + H-G 68% H- O 99.7% All+o 68% H -20/ 95% A + 20 H - 20/ 95% A +20 H - 20/4 95% H - 30 MA + 20 99.7% 4+30 H -30 68% J + 30 H - 30" 99.7% 4+30 86 83 100 117 134 151 168 49 66 83 100 117 134 151 49 68 83 100 117 134 151 b) In what interval would you expect the central 68% of the IQ scores to be found? Using the 68-95-99.7 rule, the central 68% of the IQ scores are between and (Type integers or decimals. Do not round.)An incoming MBA student took placement exams in economics and mathematics. In economics, she scored 85 and in math 85. The overall results on the economics exam had a mean of 71 and a standard deviation of 1i]; while the mean math score was 6?; with a standard deviation of 12. On which exam did she do better compared with the other students? Since she scored D standard deviations the mean in economics and D standard deviations the mean in mathematics: she did better on the exam. (Round to two decimal places as needed.)