Extension activities


The following extension activities can be exploited by colleagues who have additional time to explore and develop the strategies and principles introduced in this chapter.


» Try to create a frequency polygon which shows the distribution of grades in a set of marks from one of your EAP tests. To turn your set of results into a


frequency polygon, remember that the X-axis is used to represent the different marks gained by the students who completed your EAP test. The Y-axis shows the frequency or the number of times that each score was obtained. Perhaps the easiest way to create the polygon is to first create a histogram with a bar to represent the frequency that each EAP score was obtained. You can do this in most spreadsheet software packages. The polygon is then created by marking the upper central element of each bar and effectively joining the dots. You can also do this in the same spreadsheet software. When you have completed the polygon, consider what the pattern reveals about the distribution of grades.


» A number of websites exist which offer online calculators to assist with descriptive statistical procedures. Try using a search engine and typing


keywords such as ‘Mean calculator’ or ‘Box and whisker calculator’. Once you have identified a useful online calculator, take some data from one of your past EAP tests and see if you can use the calculator to perform one of the procedures.


» Look at the support materials that you use to report the results of your tests and assessments to students, staff or members of the public. Consider adding


a chart which presents some statistical information relating to your test scores.


» Once you have decided which statistical procedures might be useful for your own tests and working context, consider referring to these in the test


specification, so that you remember to run the procedures after each sitting of a test or assessment, where relevant.


Chapter 9: Understanding statistics and how descriptive procedures can be used to analyze EAP test results


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