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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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