A star chart shows data from several variables, usually 3 or more, which all start from the same point. Each spoke of the plot shows one variable. The length of the spoke is proportional to the relation of the data it represents and the other variables that the chart shows. These star charts don't track stars, but are called as such since they take on the appearance of a multi-pointed star at times. This plot shows the results of an observational study concerning a national test in New Zealand.
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