Help please!! I don't understand this. . . .. . .

Question

If the average IQ of students in a particular class equates to 100, and the standard deviation is 15, what IQ would a student have to have in order to be considered a genius?

Answer 1

160 and above is considered genius

140 or higher is considered high IQ

130 and above is considered very superior, that's 2 standard deviations above the mean

120 to 129 is superior

110 to 119 is above average

90 to 109 is average

71 to 89 is below average

70 or less and courts tend to consider you too low to be executed or stand trial, that's 2 standard deviations below the mean. Incompetent to stand trial or be sentenced or executed. a slightly different legal meaning for "incompetence" compared to "insanity"