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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