What is the range of the relation a. {-4,-3,-2,-1,0,1,2,4} b.{-4,-2,0,2,4} c.{-4,4} d.{-3,-2,-1,0,1}

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.