help me with this standard deviation question
by, 08-06-2010 at 09:42 PM (1850 Views)
[QUOTE=sharma1617;808316]The fourth grade at school X is made up of 300 students who have a total weight of 21,600 pounds.
If the weight of these four graders has a normal distribution and standard deviation equals 12 pounds, approximately what percentage of the fourth graders weighs more than 84 pounds?
need detailed explanation,,and also want to know what are bell curve questions and how it will relate with standard deviaion. thanks[/QUOTE]