Mathematics, 13.11.2020 20:10, Nelly6978

If the Stanford-Binet IQ test is a normal curve with mean of 100 and standard deviation of 20, what percent of the population has an IQ below 90? a) 41.73% b) 88.87% c) 31.24% d) 30.85%

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If the Stanford-Binet IQ test is a normal curve with mean of 100 and standard deviation of 20, what...