Microsoft Office Tutorials and References
In Depth Information
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
Mean
upper
Ref.
limit
limit
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
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 ).
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