|_l_ L)\" _ The stemplot shows IQ scores that are consistent with the 2018 article "Flynn effect and its reversal are both environmentally caused." 8 2 4 8 6 7 7 8 9 9 9 9 0 0 0 1 2 2 2 4 9 555556677888888999 10 000001111122344 10 555556667788899 1102233 1155668 12 234 This distribution is very close to Normal with mean 100 and standard deviation 10. Use the Normal distribution with mean 100 and standard deviation 10 as a description of the IQ scores of all adults. Use this distribution and the 68-9599.7 rule to answer the questions. What percentage p of all students have IQ scores below 80? Give your answer as a percentage to one decimal place. / 'u II $1 >Macmillan Learning