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WE want to know what the risk of sleepless nights are for students taking class A.

WE want to know what the risk of sleepless nights are for students taking class A. WE surveyed students and found that 30 of those who took class A did not sleep at least one night in the last week, while 44 slept just fine. For students in other classes, 26% of 270 of those surveyed had a sleepless night in teh last week. What is the relative risk of class A students having a sleepless night?

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