Question

It has been found that the average IQ score of students is 115 with a stanard deviation of 6. Find the probability that a random selected student will have an IQ score above 119. Assum the IQ scores are normally distributed.

Answer 1

119-115=4 is .6667σ
119 is µ+.6667σ

So you want the right tail above .6667σ
Consult your handy Z table to see that that's 25.14%