We have a data set that includes the test scores of a class.
We can represent this data, as it is univariate, with a box-and-whisker plot. This will let us graph the distribution of the scores.
A circle graph is only applicable if we group the data in classes. The same for the histogram.
They are not suitable for individual data points that are not grouped.
A scatter plot is also not suitable, as it needs ordered pairs. It will show the relation between two variables, and in this case we have only one variable in the data set.
Answer: box-and-whisker plot.
