The grades on the last history exam had a mean of 75%. Assume the population of grades on history exams is known to be normally distributed with a standard deviation of 7. What percent of students earn a score between 70% and 82%?

Question

anonymous · Answer

@Gebooors this is the last one I need to get I got all the others

gebooors · Answer

If standard deviation is 1, z= -5/7 for 70% (round this to decimal number)
And for 82% it is 1. So you look for area probability which is from -5/7 to 1.

You need to do some sketch for it.

anonymous · Answer

So would I get  0.6024