For Exercise 1.70, see page 40; for 1.71 to 1.73, see pages 41-42; for 1.74 to 1.77, see pages 44-45; for 1.78, see page 46; for 1.79 and 1.80, see page 49; for 1.81 and 1.82, see page 50; and for 1.83 and 1.84, see page 53.
1.81 What score is needed to be in the top 25%?
Consider the ISTEP scores, which are approximately Normal, . How high a score is needed to be in the top 25% of students who take this exam?
1.81
606.17.