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14.

Put in order:

{1, 6, 10, 12, 12, 13, 15, 19, 27, 31, 32, 40}

There are 12 data items, so the median is the (12 + 1) ÷ 2 = 61/2th data item.

As 61/2 is not a whole number, take the mean average of the 6th and 7th data items:

6th is 13, 7th is 15

⇒ median = (13 + 15) ÷ 2

= 14

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13y ago

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