Don
41505
Statistics 427
Assignment 6
Spring 2005
1)
Define two population mean diameters at breast height: one, denoted by
μ
A
,
for site A and one, denoted by
μ
Β
, for site B.
Be sure to explain exactly which
population of trees these means correspond to.
Let X
1
denote the diameter at breast height (DBH) of the Site A and X
2
denote
the diameter at breast height (DBH) of Site B.
Therefore, we will test the
research hypothesis H1:
μ
1<
μ
2, where
μ
1 denotes the population mean of site
A which is the diameter at breast height (DBH) of the Banksia trees who
where burned more frequently during this period and
μ
2 denotes the
population
mean of site B which is the diameter at breast height (DBH) of the
Banksia trees who where burned infrequent during this period.
2)
Formalize the contention from above as a research hypothesis relating
μ
a and
μ
b. State the hypothesis in words (in the context of this study) and also in
terms of the symbols
μ
a and
μ
b.
Briefly justify your choice of this research
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 Spring '09
 Staff
 Statistics, 12 degrees, Diameter at breast height, Banksia trees

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