High IQ scores. The Wechsler Adult Intelligence Scale
Chapter , Problem 1.133(choose chapter or problem)
High IQ scores. The Wechsler Adult Intelligence Scale (WAIS) is the most common IQ test. The scale of scores is set separately for each age group, and the scores are approximately Normal with mean 100 and standard deviation 15. The organization MENSA, which calls itself the high-IQ society, requires a WAIS score of 130 or higher for membership. What percent of adults would qualify for membership? There are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on a scale from 1 to 36. The distribution of ACT scores is approximately Normal with mean m 21.5 and standard deviation s 5.4. SAT scores are reported on a scale from 600 to 2400. The distribution of SAT scores is approximately Normal with mean m 1498 and standard deviation s 316. Exercises 1.134 to 1.143 are based on this information. 1.13
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