The distribution of IQ

The distribution of IQ (Intelligence Quotient) is approximately normal in shape with a mean of 100 and a standard deviation of 18. According to the standard deviation rule, % of people have an IQ between 46 and 154. Do not round.The distribution of IQ (Intelligence Quotient) is approximately normal in shape with a mean of 100 and a standard deviation of 18. According to the standard deviation rule, only % of people have an IQ over 118.The distribution of the amount of money spent by students on textbooks in a semester is approximately normal in shape with a mean of: ? = 417 and a standard deviation of: ? = 21.According to the standard deviation rule, almost 2.5% of the students spent more than what amount of money on textbooks in a semester?

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