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The distribution of the amount of money spent by students on textbooks in a semester is approximately normal in shape with a mean of: =

The distribution of the amount of money spent by students on textbooks in a semester is approximately normal in shape with a mean of: = 419 and a standard deviation of: = 39.

According to the standard deviation rule, almost 0.15% of the students spent more than what amount of money on textbooks in a semester?

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