Mathematics
Jayla
2016-04-18 17:51:27
Help please! The grades received by 200 students follow a normal distribution. The mean of the grades is 70%, and the standard deviation is 7%. The number of students who received a grade greater than 70% is about? and the number of students who got a grade higher than 84% is about?
ANSWERS
NevadaBeatley471
2016-04-18 20:07:27

Multiply 50% by 200 = 100  The number of students who received a grade greater than 70% is about 100, because 50% of the data is above the mean.  100% - 95% = 5%  (%5)2 = 2.5% 2.5 of 200 people is 5 people. 

ADD ANSWER