A lower quartile for a set of four observations is not a meaningful concept.
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The median is 50, the middle number when they are listed in order.
It is 58. the lower quartile is 50 while the median is 52.Email me at ericmal15@yahoo.com if you need more info and title it Answers.com stuff so i will read it.
45, 46, 47, 48, 50, 50, 53, 54, 55
You can tell by looking at it that 47 + 84 is 131. I suppose you could estimate 50 + 80 or 45 + 85
45, 46, 47, 48, 49, 50, 51, 52, 53, 54 Ten of them.