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Smartphones: A poll agency reports that 47% of teenagers aged 12-17 own smartphones. A random sample of 147 teenagers is draw

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solution lip = 0.47 { corrent} p = 0.0412 Plå 30.50) = P(23 0.50-0.47) 2 2 = p b 2 0.0412 Velib) =P(2) 0.73) tros ) 0.2327

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