Statistics - Z-test for a proportion.?

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Super F

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The American Automobile Association (AAA) claims that 54% of fatal car/truck accidents are caused by driver error. A researcher studies 30 randomly selected accidents and finds that 14 were caused by driver error. At a significance level of , can the AAA claim be refuted?
sorry, it should say "at a significance level of 0.05.
 
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