I. ASSUMING THAT THE AGES FOLLOW THE NORMAL DISTRIBUTION WITH A MEAN OF 35, STANDARD DEVIATION OF 4, AND THE NUMBER OF SAMPLES IS 250. 1. FIND THE VALE OF Z A. 2.25 B. -1.25 C. 35 D. 0.25 2. HOW MANY PERSONS WOULD YOU EXPECT TO HAVE AGES ABOVE 30? A. 250 B. 222 C. 223 D. 224

II.THERE ARE 750 STUDENTS WHO TOOK THE PRELIM EXAM IN STATISTICS. THE AVERAGE SCORE IS M= 75 AND THE STANDARD DEVIATION OF 7. HOW MANY STUDENTS OBTAINED A SCORE BELOW 70. (EXPRESS Z VALUE UP TO 2 DECIMAL PLACES ONLY) A. 179 B. 525 C. 196 D. 180 SHOW THE COMPLETE SOLUTION