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Due to the wind, flight times are shorter when traveling west to east versus east to west. Below are 10 trips with the flight times

Due to the wind, flight times are shorter when traveling west to east versus east to west. Below are 10 trips with the flight times going in both directions. At a 0.01 significance level, is there evidence that flying west to east is on average 1 hour or more faster than flying east to west? Assume the difference in times is normally distributed.

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