How do you find the first and third quartiles of 14, 4, 13, 18, 8, 15, 8, 3, 11, 8?

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Answer 1 · 2017-09-20T13:30:51

#1st" quartile "=8#

#3rd" quartile"=14#

Firstly you need to arrange the numbers in order

#3, 4,8,8,8,11,13,14,15,18#

next find the Median, we have #10# number so the median is in the middle of the #" "5th" "#&#" "6th" "# numbers

#3, 4,8,8,8,color(blue)(M)11,13,14,15,18#,

the #1st" quartile "# is the middle number of the lower half.

#3, 4,color(red)(8),8,8,color(blue)(M)11,13,14,15,18#,

the third quartile is the middle of the top half

#3, 4,color(red)(8),8,8,color(blue)(M)11,13,color(green)(14),15,18#,

we have

#1st" quartile "=8#

#3rd" quartile"=14#