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are these two groups significantly different?

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tonySingle

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Nov 4, 2009, 12:58:40 PM11/4/09
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Hi,
I have two groups of data: In every group there are 29 subgroups, in
every subgroup, there are 1-15 numbers ranged from 0 to 80. The
subgroups are DEPENDENT of each other.
I wanna compare whether these two groups are significantly different
without mixing all numbers in subgroups together. How should I use
Origin to do the analysis?

To make one example of this question, suppose:
2 groups, in every group there are only 3 subgroups, in every subgroup
there are at most 5 numbers ranged from 0 to 80:

group 1:
subgroup a: 0.1, 23, 44, 12.5, 5.0
subgroup b: 24
subgroup c: 23, 44

group 2:
subgroup a: 32, 45, 5.5, 6.7
subgroup b: 22.2, 45, 56, 52, 10
subgroup c: 2.2, 4.5, 6.1, 32

In every group, the 3 subgroups are not independent of each other. How
can I compare whether group 1 and 2 are significantly different from
each other, without mixing the 8 numbers in group 1 together and
mixing the 13 numbers in group 2 together?

Thank you very much
Tony

Paige Miller

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Nov 4, 2009, 4:18:52 PM11/4/09
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I think you have to explain what makes the subgroups dependent on each
other.

--
Paige Miller
paige\dot\miller \at\ kodak\dot\com

Rich Ulrich

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Nov 5, 2009, 3:48:44 PM11/5/09
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Also, do you refer to "means" - which is the usual - when you
say "different", or are you thinking of something else?
These subgroups do not look particularly homogeneous.

And is there a scaling issue? - I notice that there is a wide
range of numbers, and yet a few of them are reported with
a decimal place. Is there a special status of fractions? Is there
a magic status of "zero" that keeps 0.1 from being rounded
to 0?

--
Rich Ulrich

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