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valenzueladomipay09u
11.01.2020 •
Mathematics
When the stanford-binet iq test came into use in 1932, it was adjusted so that the scores for each age group of children followed roughly the normal distribution with a mean of 100 and a standard deviation of 15. the test is readjusted from time to time to keep the mean at 100. if present-day american children took the 1932 stanford-binet test, their mean score would be about 120.
the reasons for the increase in iq over time are not known but probably include better childhood nutrition and more experience in taking tests.
if children today took the 1932 test, _percent will have very superior scores. iq scores above 130 are often called very superior. assume that the standard deviation 15 does not change. (round your answer to one decimal place.)
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