Tom613

IQ scores in a certain population are normally distributed with a mean of 96 and a standard deviation of 12. (Give your answers correct to four decimal places.) (a) Find the probability that a randomly selected person will have an IQ score between 83 and...

So this is how I did the last one and it came up wrong, (93-96)/12=-.25 I looked it up on graph and it came up to 0.4013 but it says it is wrong, what did I do wrong..