82.5 is the average.
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smallest number is 70 largest is 95 95-70=25=range
95 - 25 = 70
About 95% of the population has IQ scores between 70 and 130. This is the average range on a standard IQ test.
It is: 70/95 times 100 = 73.684% rounded to three decimal places
The average IQ is 100, with two-thirds of the population having IQs between 85 and 115, and 95% of the population having IQs between 70 and 130.