I AUIIVIIY I .12.;tk...r..t.,._.._.u. In 201 5, the College Board SAT mathematics score of high school seniors, which follow an approximately normal distribution, had a mean of511 and a standard deviation ot1202. 1) What percentage of seniors who took the test in 2015 scored between 271 and 751? 0 approximately 50% 0 approximately 68% 0 approximately 95% 2) What percentage of seniors who took the test in 2015 scored above 631? 0 approximately 16% 0 approximately 68% 0 approximately 84% 3) What percentage ot seniors who took the test in 2015 scored between 271 and 511? 0 approximately 68% 0 approximately 15% 0 approximately 47.5% 4) Should a score of 770 be considered unusual? 0 Yes 0 No