To accurately determine which sentence is true about the test scores in Miss Robinson's second and fourth period classes based on the double box plot, I would need to see the specific details or values represented in the plot.
Generally, a box plot provides information such as the median, quartiles, and possible outliers of the dataset. You could compare the medians, the interquartile ranges (IQRs), and the overall ranges of the scores for both classes to draw conclusions.
If you can describe the key features of the box plot—like the medians, ranges, or any significant differences in the distributions of the two classes—I could help you determine which sentence about the test scores is true.