Chrome File Edit View History Bookmarks Profiles Tab Window Help Wed 3:11 PM Q DE Take a Test - Shane Amar mathxl.com/Student/PlayerTest.aspx?testld=236877080¢erwin=yes UC application Math 54: Elementary Statistics (2) Shane Amar & | 11/03/21 3:11 PM m Or X + V C a coursehero. S Update : Apps M Gmail YouTub E Test: Test 2 Question 19 of 20 This test: 50 point(s) possible This question: 4 point(s) possible Submit test Reading List The ability to determine the age of some individuals can be difficult if there are not quality government records of birth. Bone growth takes place at the growth plates at X the end of long bones. Once all growth plates fuse, growth stops, and an individual is considered a biological adult. The age at which growth plates fuse for males is approximately normally distributed with a mean of 18.6 years and a standard deviation of 15.1 months. Complete parts (a) through (d). Course 128 (a) What is the probability a male's growth plates fuse after age 21? The probability a male's growth plates fuse after age 21 is (Round to four decimal places as needed.) (b) What is the probability a male's growth plates fuse before age 18? The probability a male's growth plates fuse before age 18 is. (Round to four decimal places as needed.) (c) What proportion of male growth plates fuse between 16 and 18 years of age? The proportion of male growth plates that fuse between 16 and 18 years of age is. Round to four decimal places as needed.) (d) Would it be unusual for a male's growth plates to fuse when he is 22 years old or older? Explain. This event unusual, because is equal to , which is V (Round to four decimal places as needed.) Time Remaining: 01:03:48 Next 3