Scores on the Wechsler Adult Intelligence Scale (a standard IQ test) for the 20 to 34 age group are approximately normally distributed with mean=115 and standard deviation=24.
a. What percent of people aged 20 to 34 have IQs between 125 and 150?
b. MENSA is an elite organization that only admits as members people who score
in the top 2.3% on IQ tests. What score on the Wechsler Adult Intelligence Scale would an individual aged 20 to 34 have to earn to qualify for MENSA
membership?