A company is studying four methods for extracting an important bio-fuel from a plant species. It obtained the plants from four sources (countries)
and thought that the source might affect the amount of bio-fuel extracted. It decided to treat the source as block in the study of the extraction method.
It arranged to study the four methods and the amount of bio-fuel that can be extracted from one unit of biomaterial from each source. The data represents the amount of bio-fuel in liters extracted from one unit of biomaterial. Analyze the data stating your hypotheses and conclusions clearly. Test at 2.5% level of significance.

Transcribed Image Text:

Extraction methods Source I II III IV I 80 85 90 95 II 85 89 94 96 III 89 91 99 100 IV 92 100 105 110