There are now over 100 tests of intelligence available,most of which are standardised to have a score of 100 as the mean.What percentage of the population will have IQ scores less than 2 standard deviations from the mean?

Question

Quizplus · Accepted Answer

The empirical rule states that for a normal distribution, approximately 95% of the data will fall within 2 standard deviations of the mean. Therefore, the percentage of the population with IQ scores less than 2 standard deviations from the mean is 100% - 95% = 5%.

There Are Now Over 100 Tests of Intelligence Available,most of Which