(Solved): The Mental Development Index (MDI) of the Bayley Scales of Infant Development is a standardized mea ...

The Mental Development Index (MDI) of the Bayley Scales of Infant Development is a standardized measure used in observing infants over time. it is approximately normal with a mean of 100 and a standard deviation of 16 . Complete parts a through $c$. a. What proportion of children has an MDI of (i) at least 116? (ii) at least 77? (i) The proportion of children having an MDI of at least 116 is (Round to four decimal places as needed.) (ii) The proportion of chlidren having an MDI of at least 77 is (Round to four decimal places as needed.) b. Find the MDI score that is the 83 rd percentles The B3rd percentle MDI score is (Round to hwo decimal places as needed.) c. Find the MDI score such that only 17\% of the population has an index beiow it 17\% of the population have an MDI score below (Round to two decimal places as needed.)