Statistical analysis can be a complex process. However, the statistics required for studies most commonly done in critical
care transport research are fairly straightforward. Statistics are This 13th article of the Basics of Research series is first in a short series on statistical analysis. These articles will discuss creating your statistical analysis plan, levels of measurement, descriptive statistics, probability theory, inferential statistics, and general considerations for interpretation of the results of a statistical analysis. 56-59_YMAM538_Thomp_CP1 2/24/09 5:34 PM Page 56
March-April 2009 57 generally descriptive (describing what is) or inferential (determining
the likelihood of a real difference being present in the population). To select the most appropriate statistics, investigators
need to know which type of question they are asking
and the level of measurement being used for the variables.
This article presents information on levels of measurement
and descriptive statistics, leaving probability theory and inferential
statistics for a future issue.