Gisele's deviation IQ score is one standard deviation above the mean for children her age. Therefore, given that deviation IQs are normally distributed we would estimate that __________% of children her age have a lower IQ than Gisele's.

Question

Quizplus · Accepted Answer

In a normal distribution, a score that is one standard deviation above the mean is higher than approximately 84% of the distribution. This is because 68% of scores lie within one standard deviation of the mean, leaving 16% in the tail beyond one standard deviation above the mean. Adding this 16% to the 68% gives us 84%.

Gisele's Deviation IQ Score Is One Standard Deviation Above the Mean