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Fig. 3.9 Hypothetical Example of Item #8 of the NABT Internet Survey
dealing with ecology/environment, instructional materials and
resources, and education. Suppose that the NABT wanted to evaluate
the quality of articles in this journal and has sent out an Internet
Survey to its members. Suppose, further, that you have been asked
to do the data analysis for the returned surveys, and that you have
decided to test your Excel skills on a hypothetical Item #8 of the
survey (see Fig. 3.9 )
This item would have the following hypotheses:
H 0 :
m
5.5
H 1 :
m
5.5
Suppose that your research produced the following conﬁdence interval for this
item on the survey:
- - - - - - - - - - - - 5.5- - - - - - - - - - - - - - - 5.7- - - - - - - - - - - - - - - - 5.8- - - - - - - - - - - - - - - - 5.9- - - - - - - - - - - - - - - -
Ref.
Value
lower
limit
Mean
upper
limit
Result:
Since the reference value is outside the conﬁdence interval, we reject the
null hypothesis and accept the research hypothesis.
The three rules for stating the conclusion would be:
Rule #1: You must include the word “signiﬁcantly” since the reference value is
outside the conﬁdence interval
Rule #2:
The key terms would be:
– Members of the NABT
– The American Biology Teacher
– signiﬁcantly
– rated the quality of articles
– Internet survey
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