This chart shows the number of soldiers killed according to two different sources. Source A is a book written by university
professors. Source B is from a well-known historical website.
MANI
CHAD
BASI
MAN
Number Killed Number Killed
(Source A) (Source B)
811,000 ,700,000
AM
Russia
Britain
908,371
S
France
KER
United States
913,000
1,398,000
114,000
1,100,000
2,037,000
,357,800
116,516
1,200,000
1,773,700
ELLER
Austria-Hungary
Germany
In a paragraph, explain why the data presented is different, and evaluate the reliability of each source. Which should be
used in a school research project, and why?