The Statistics Games are played by a large number of students across the county. Last year, 32% of Clayton State participated in the Games. You wonder: "Has the proportion increased this year?". To find out, you take a random sample of 250 CSU students and ask them if they participated in the Games this year. You find that 38% did. Calculate the test statistic for the proportion of CSU students who participated this year. Give your answer to 2 decimal places.

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