70,51,74,92,92,84,51,50,97,98,92,83 In the data set above,what is the upper quartile? A.68 B.83 C.92 D.59.5

so, above the 75th percentile. to anyone else who comes

i don't get it

arrange it in a grid.

by least to greatest?

yup

50,51,51,70,74,83,84,92,92,92,97,98

now divide that into 4 groupings

how do you do that. i know how to divide but the other part is what i dont get.

oh, don't divide. i mean split em into 4 groups

do you recall what a median is?

oh ya. its the middle number.

well, a quartile is the same concept, but it is the numbers in the 4ths positions, not the half position

i think its b. im pretty positive

50,51,51 70,74,83 84,92,92 92,97,98 | 1 | 2 | 3 | 4 | you sure?

never mind. this is pretty hard.

but we are at the end, all thats left is to pick the number from the groupings

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