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Tue 26 Feb, 2013 09:03 pm
An airline reported over a two week period they had an average of 1123 late arrivals, with a standard deviation of 115. With 95% confidence is there evidence that this airline is different from the national average of 1200?
@Renan,
Use the same technique we used in your Reece's pieces problem. Find the difference between the actual and expected values then compare to 1.96 standard deviations.
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