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?

Question

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?

dan815 · Answer

do you know the normal distribution formula? or do you work off z tables

dan815 · Answer

lets start with something simple, if 70% is the mean, that means 70% divides both of the populations scores in half

kitkat16 · Answer

this is what i have so far. give me a min.

dan815 · Answer

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