Question

The box plot represents the scores on quizzes in a science class.

A box plot uses a number line from 70 to 86 with tick marks every one-half unit. The box extends from 76 to 80.5 on the number line. A line in the box is at 79. The lines outside the box end at 72 and 84. The graph is titled Science Quizzes, and the line is labeled Scores On Quizzes.

What value does 25% of the data lie below? Find the value.

Lower quartile (Q1) = 72
Lower quartile (Q1) = 76
Upper quartile (Q3) = 80.5
Upper quartile (Q3) = 84

Answer 1

To find the value below which 25% of the data lies, you can use the lower quartile (Q1), which is the 25th percentile. In the given information:

Lower quartile (Q1) = 76

So, 25% of the data lies below the value 76.