PLZ HELP!Professor Carlson calculates a 63% average on a chapter test from her first-year physics class. Fearing the test was too difficult, professor Carlson enters the scores into a computer program which generates the following box-and-whisker plot. Which of the following statements is an appropriate conclusion for professor Carlson to draw from the plot? A.
Every student in the class scored between a 72% and 92%. The test was not too difficult.
B.
Only about one-third of the class received a 72% or better. The test was obviously too difficult.
C.
At least half of the class earned received a 72% or less on the test. The test was probably too tough.
D.
Three-quarters of the class was able to earn a 72% or better on the test. Overall, students were able to perform. Thus, the test was appropriate.