Posted by
Kuan on
Oct 06, 2011; 2:08pm
URL: http://spssx-discussion.165.s1.nabble.com/ANOVA-with-Pos-hoc-comparisons-tp4871444p4876644.html
Thanks for reply.
There are 163 for A group, 28 for B group & 6 group. I tried several
comparison methods, including, Tukey HSD, Bonferroni, and Scheffe. I got
same results.
Actually, I measured two DVs in the study. In addition to the one Ｉã
mentioned in my previous message, I also have run a ANOVA for another DV. I
got a significant difference among the three groups and got significant
differences between A and B and between A and C on post hoc comparisons.
Kuan
On Wed, 5 Oct 2011 06:05:32 -0700, Bruce Weaver <
[hidden email]>
wrote:
>Also missing: Which multiple comparison method did you use?
>
>
>David Marso wrote:
>>
>> Missing info: Sample sizes of each group!!!
>>
>> Kuan wrote:
>>>
>>> Hi, I have run a one way analysis of variance using SPSS. The result of
>>> this
>>> test was a significant difference among the three groups. The mean scores
>>> and SDs for three groups were 3.74 (0.72) for A group, 3.26 (0.92) for B
>>> group, & 3.25 (0.83) for C group. To determine where significant
>>> differences
>>> lie, I performed a post hoc analysis. SPSS showed me that there was a
>>> significant difference between A & B, however, no significant difference
>>> between A & C.
>>> But the mean difference between A & C is larger than the mean difference
>>> between A & B. I wonder why there is no significant difference between A
>>> & C?
>>>
>>> Any help would be greatly appreciated!
>>>
>>> Kuan
>>>
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>>
>
>
>-----
>--
>Bruce Weaver
>
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