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5 Do people walk faster in the airport when they are departing or arriving Findings are displayed in the table below Normal probability plots indicate that the data are approximately normal and boxplots indicate that there are no outliers Departure 260 53 35 Mean speed ft min Standard Deviation ft min Sample Size a Is this independent or dependent Arrival 269 34 35 b Do individuals walk at different speeds depending on whether they are arriving or departing at the a 0 05 level of significance
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