The figure below shows a cumulative relative frequency histogram of 40 scores on

Question

The figure below shows a cumulative relative frequency histogram of 40 scores on a test given in a Statistics class. Which of the following conclusions can be made from the graph?

a) There is greater variability in the lower 20 test scores than in the higher 20 test scores.

b) Sixty percent of the students had a test score above 80.

c) The median test score is less than 75.

d) The horizontal nature of the graph for test scores of 60 and below indicates that those scores occurred most frequently.

Explanation / Answer

Result:

a) There is greater variability in the lower 20 test scores than in the higher 20 test scores.

Answer: b) Sixty percent of the students had a test score above 80.

c) The median test score is less than 75.

d) The horizontal nature of the graph for test scores of 60 and below indicates that those scores occurred most frequently.

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