No and a single number cannot have a median either you need a series (at least two) to have a median.
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Median is the middle number in a group of numbers. If there more than one middle number, the median is either shown as average of the two numbers in the middle or shown as both the numbers. The median in 23 24 26 29 is 25 or {24;26}.
No.There is only 1 middle value.If there are an odd number of elements in the data set, the median is the middle one;Otherwise there are an even number of elements in the data set and the median is the mean average of the middle two (add them together and divide by 2).The median value can occur more than once in the data set, eg in {2, 5, 5, 5, 6, 7} the median is 5 ((5 + 5)/2 = 5) with a frequency of 3, but it is still only one value.
30 is one more than 29.
26
7 of the months in a year are 31 days long, which is of course the maximum. One might be tempted to say 30.5 was the median, since then half the months are strictly longer; but then only 5 months are shorter, which is less than half. So I would prefer to say that 31 is the median, since half the months are greater than or equal, and half are less than or equal to the median.