Confidence interval for percentage of on-time departures

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1. It is important for airlines to follow the published scheduled depar- ture times of flights. Suppose that one airline that recently sampled the records of 246 flights originating in London found that 20 flights were delayed for severe weather; 4 flights were delayed for maintenance concerns, and all the other flights were on time.

(a) Compute a 95% confidence interval for the percentage of on-time departures.

(b) Compute a 95% confidence interval for the occurrence of severe weather.

Reference no: EM133084020

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