11.5 Mr. A has received. evertJ're lastthree melrltj'lsr a snlicilipn to purchase a service that claims tel be able tr: forecast mmrements in the Dew Jenes Ind ustrial index. Hnm'lallv, he dues net believe in such thingsI but the service prevides evidence [If amazing,r accuracy. In each at the last three mclnths, it was always right in predicting whether or net the inde: 1.II.|'I::Iu|d me up more than 10 paints. stay within a 10-point range crr Eu dmvn by mere than 1B paints. 1n|"n|'r.lulld yen advise him tr: purchase the service? 1nl'llfh'5.r pr why net