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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
6¼

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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