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The following article
was written by Coleman Patterson and
appeared in the Business section of the Abilene Reporter-News.
Learning statistics like learning a
language, May 26, 2006, 2D.
When many people think about statistics,
they often cringe. Reasons for this are
probably widely varied. Some people may have
phobias that have followed them into their adult lives from their mathematics and
quantitative courses in high school or college. Some
may be intimidated by the complex sounding lingo of the field. Others may avoid ever approaching the topic due to
beliefs that the concepts are too difficult to learn, that conclusions can be manipulated
to meet the will of the investigator, or that the techniques are not really useful. In the view of many, statistic and
sadistic are two words that can be used interchangeably.
In reality, none of those are valid
reasons to avoid or shun statistics. While
statistics involves the use and manipulation of numbers, the emphasis for practitioners is
not on mathematics, but on interpretation and analysis of validity. Computers can now perform complex mathematical
computations quickly and accurately. It is
now most important for users of statistics to understand how to apply statistical tools
and techniques and to interpret results. Mastering
these concepts can help managers in their jobs.
Managers are problem solvers. When confronted with exceptions to established
work processes, managers step in to resolve the exceptions with their organizations
best interests in mind. If there were no
organizational problems, the managers job would be that of an engineer. The manager would simply designate a level of
performance, adjust the appropriate controls on the machine, turn on the
machine for a determined time, and then turn off the machine at the end of the day. Periodically, the manager would have to perform
maintenance or repair and occasionally upgrade the equipment with a better model. There are very few organizations that operate like
machines. Most managers deal with work
process problems, individual problems, group problems, organizational problems, and
problems that arise from sources outside the organization.
A managers job is very complexa variety of skills, competencies,
and problem solving tools are needed to be successful.
Statistics is a decision-making tool. It is a way to draw information from
datawhich is then used by managers and decision-makers to solve organizational
problems. There are two basic types of
statistics, descriptive and inferential. Descriptive
statistics describe the data (the number of data points, the middle of the
data range, the dispersion of numbers, etc.). Inferential
statistics is more complex than descriptive statistics because it involves
inferring measures drawn from a sample to a population. A host of errors and threats to validity can creep
into inferential statistics. Conclusions are
drawn using the notions of sampling theory and probability.
With a little time and effort, almost
anyone can learn the fundamental tools and techniques of statistics. In many ways, learning statistics is like
learning a languagea language that uses numbers, logic, and scientific analysis. The conclusions drawn from properly conducted
statistical analyses provide sources of information for managers that cannot be gained
solely from experience, intuition, or professional judgment.
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