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Fig. 3.8
Example of Item #15 of the NABT Survey

Essentially, the null hypothesis equal to 4 states that if the obtained mean score

for this question is not signiﬁcantly different from 4 on the rating scale, then

attendees, overall, were neither likely nor unlikely to recommend to colleagues

that they attend next year’s annual conference.

Suppose that your analysis produced the following conﬁdence interval for this

item on the survey.

- - - - - - - - - - - - - - - 1.8- - - - - - - - - - - - - - - 2.8- - - - - - - - - - - - - - - 3.8- - - - - - - - - - - - - - - 4- - - - - - - - - - - - - - -

lower

limit

Mean

upper

limit

Ref.

Value

Result: Since the reference value is outside the conﬁdence interval, we reject

the null hypothesis and accept the research hypothesis.

Rule #1: You must include the word “signiﬁcantly” since the reference value is

outside the conﬁdence interval

Rule #2: The key terms would be:

– attendees

– Internet survey

– signiﬁcantly

– NABT annual meeting this year

– either likely or unlikely (since the result is signiﬁcant)

– recommend to colleagues

– attend next year’s annual meeting of the NABT

Rule #3: Attendees at this year’s annual meeting of the NABT were signiﬁcantly

unlikely to recommend to colleagues that they attend next year’s annual

meeting of the NABT.

Note that you need to use the word “unlikely” since the sample mean of 2.8 was

on the unlikely side of the middle of the rating scale.

CASE #3:

The National Association of Biology Teachers (NABT) publishes the

journal:
The American Biology Teacher
which includes articles

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