Slow Mondays: The owner of a restaurant believes that she serves the same number of customers on Mondays as on Tuesdays. For 12 weeks she counts the number of customers who come in on Monday and on Tuesday, with the following results.

Can you conclude that the median number of customers differs between Mondays and Tuesdays? Use the α = 0.01 level of significance.

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Week 1 2 3 5 6 7 8 9 10 11 12 Monday 163 122 218 137 131 157 140 169 154 Tuesday 173 113 215 139 149 154 159 161 162 62 215 212 125 222 214 133