The question is not influenced by the fact that it's about intelligence - standard deviation is a way of describing data and it's the same for all kinds of data.
So in general, one standard deviation away from the mean in both directions encompases around 66% of the cases - so here it would be 66% of children.
Additionally, 95% of all children should lie withing two standard deviations - so two standard deviations below or above the average.
They do it because they want people to experience new rides, instead of the same old boring rides they’ve been on several times.
Just select the fraction text and choose Open Type > Fractions from the Character panel menu.
The difference between a calculator and a computer is that when a calculator performs computations it is slower but needs more human assistance - C.
While a computer on the other hand, computes tens of thousands of computations without any human input, all done automatically.
