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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 drawn. Round your answers to

Smartphones: A poll agency reports that 47% of teenagers aged 12-17 own smartphones. A random sample of 147 teenagers is drawn. Round your answers to at least four decimal places as needed. (a ) Find the mean ul P The mean un is P

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