Suppose that 20 students take a statistics exam worth 100 points. The standard deviation of the exam scores is 5 points. Which one of the following statements gives the most reasonable description of the distribution of exam scores?

The difference between 23 and Q1 is 5.
All of the individual scores are five points apart.
A typical score is within 5 points of the mean.
The difference between the highest and lowest score is 5.