Final answer:
The box-and-whisker plot provides insights into the distribution of the data and concentration of grades. The long left whisker and spread of the lower 50 percent indicate a left-skewed distribution with a concentration of A and B grades. Potential outliers can also be identified by comparing the quartiles and IQR.
Step-by-step explanation:
The box-and-whisker plot is a graph that displays the distribution of a data set. It consists of five values: the minimum value, the first quartile, the median, the third quartile, and the maximum value. The shape of the box plot provides insights into the spread and concentration of the data. In this case, the long left whisker and the spread of the lower 50 percent of the exam scores being greater than the upper 50 percent indicate a left-skewed distribution with a concentration of A and B grades. The presence of potential outliers can also be identified by comparing the quartiles and the IQR.