A major airline is attempting to evaluate the effect of recent changes it has made in scheduling flights between New York City and Los Angeles. Data available are shown below:

Using January as the base period, compute a productivity index for January and June, and comment on what those productivity indexes tell about the productivity trend.

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Month prior to schedule change (January) Month after schedule change (June) Number of Flights 16 27 Number of Passengers 8,795 15,653