A professor wants to check the distribution of test scores, based on point values, on a recent test.What type of graph would be the most effective presentation?

Group of answer choices

Pie chart showing break down of letter grades

A Pareto chart sorting letter grades on the test from most frequently occurring to the least frequently occurring

A confidence interval with last year's test scores as the mean

Scatter plot with letter grades on the x-axis and time to complete the test on the y-axis

Histogram with test scores grouped into classes on the x-axis