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Some suggestions on presenting data and statistical results

In text:

Description (but not interpretation) of your results belongs in the Results section. This includes a description of statistical tests used and the results of these tests. For example, if you found a statistically signficant difference in the growth rates of lettuce seedlings when grown alone vs. when grown with onions, the text text of your Results section should include a sentence similar to:

"Lettuce seedlings show significantly higher growth rates when grown in the presence of lettuce seedlings alone than when grown in the presence of onion seedlings (t = 2.73, d.f. = 14, alpha=0.05)."

Where alpha is the significance level.

As a table:

A summary of your data and the results of your statistical analysis may be concisely presented in a table. This table should include the three descriptors useful for describing any sample (i.e., n, mean, and standard deviation), a clear indication of the comparistions being made, and the results of the statistical test. For example:

Table I. Appropriately descriptive title ....

Growing with lettuce

Growing with Onion

t-value

Significance

(alpha=0.05)

Lettuce growth

Mean+

S.D.=

n=8

Mean+

S.D.=

n=8

2.73

*

Onion Growth

Mean+

S.D.=

n=8

Mean+

S.D.=

n=8

1.49

NS

 

Note: Lettuce growing with lettuce corresponds to Control I; lettuce growing with onion corresponds to Treatment I. In the hypothetical table example, a t-test test for the difference between these two means gave a t-value of 2.73, which is significant (indicated by a * under the Significance column). In this hypothetical example, there was no statistically significant difference between the growth rate of onion when grown alone (Control II) versus with lettuce (Treatment II). This is indicated in the significance column by "NS" (for not significant).

 

 

 

Web sites related to Scientific Presentation and Analysis

http://www.inform.umd.edu/ENGL/
Resources/WritCenter/

Need help with writing? This link is for the University of Maryland Writing Center