on of the amount of money spent by students on textbooks in a semester is approximately normal in shape with a mean of 461 and a standard deviation of 33 According to the standard deviation rule approximately 95 of the students spent between on textbooks in a semester and Question 12 Type numbers in the boxes Part 1 5 points Part 2 5 points 10 points The distribution of IQ Intelligence Quotient is approximately normal in shape with a mean of Type numbers in the boxes 100 and a standard deviation of 12 10 points