Question

is the following histogram misleading? if so, what is wrong with the graph?
history test scores
histogram image with test scores (0, 60, 70, 80, 90, 100) on x - axis and number of students on y - axis
options:

• no. it is clear that the median is around 75.
• no. the symmetry makes it easy to read.
• yes. the intervals on the horizontal axis are not consistent.
• yes. the vertical scale should start at 7, since each category has more than 7.

Explanation:

Histograms should have consistent intervals on the horizontal axis. In this case, the intervals from 0 - 60, 60 - 70, 70 - 80, 80 - 90, 90 - 100 are not consistent (the first interval is 60 units while the others are 10 units). This inconsistency can mislead the viewer when interpreting the data distribution.

Answer:

Yes. The intervals on the horizontal axis are not consistent.