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Suppose A = a speeding violation in the last year and B = a cell phone...

Suppose A = a speeding violation in the last year and B = a cell phone user while driving. If A and B are independent then P(A ∩ B) = P(A)P(B). A ∩ B is the event that a driver received a speeding violation last year and also used a cell phone while driving. Suppose, a study was conducted and the following data were gathered

Speeding Ticket NOT Speeding Ticket
Cell Phone User 24 27
Cell Phone NOT user 21 20

What is the Test Statistics to test the Null Hypothesis H0 : Being a cell phone user while driving and receiving a speeding violation are independent events against the alternative hypothesis  Ha : Being a cell phone user while driving and receiving a speeding violation are dependent events?

Math   Statistics-And-Probability   
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