Records are kept by each state in the United States on the number of pupils enrolled in public schools and the number of teachers employed by public schools for each school year. From these records, the ratio of the number of pupils to the number of teachers (P-T ratio) can be calculated for each state. The histograms displayed through frequency tables below show the P-T ratio for every state during the 2001–2002 school year.
Histogram for states west of the Mississippi River (frequency table):
P-T Ratio Frequency
10-12 3
12-14 4
14-16 5
16-18 6
18-20 3
20-22 3
Histogram for states east of the Mississippi River (frequency table):
P-T Ratio Frequency
10-12 2
12-14 4
14-16 6
16-18 7
18-20 5
20-22 2
Based on the histograms, which of the following statements is correct?
