Question: It is thought that the average textbook cost us $250. The following data is how much 12 students at a particular college spent on one

It is thought that the average textbook cost us $250. The following data is how much 12 students at a particular college spent on one of their textbooks:

200, 175, 450, 300, 350, 250, 150, 200, 320, 370, 404, 250

Is there sufficient evidence to indicate that students at this college are spending more than $250? Test at a=0.10

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