Scores on the Wechsler Adult Intelligence Scale (an IQ test) for the 20 to 34 year old age group are approximately Normally distributed with 110 and 25 a What percent of people aged 20 to 34 have IQs between 125 and 150 b MENSA is an elite organization that admits as members people who score in the...

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Scores on the Wechsler Adult Intelligence Scale (an IQ test) for the 20- to 34-year-old age group

Question:

Scores on the Wechsler Adult Intelligence Scale (an IQ test) for the 20- to 34-year-old age group are approximately Normally distributed with μ = 110 and σ = 25 .

a. What percent of people aged 20 to 34 have IQs between 125 and 150?

b. MENSA is an elite organization that admits as members people who score in the top 2% 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?