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mean difference

   Also found in: Wikipedia 0.03 sec.
mean difference [′mēn ′dif·rəns]
(statistics)
The average of the absolute values of then(n- 1)/2 differences between pairs of elements in a statistical distribution that hasnelements.


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When 15 malaria episodes with malaria-free visits 1 month before and after the episode were compared, mean difference (signed-rank test) in viral load "before" and "after" malaria was not significant.
The result of an independent sample t-test of group difference is displayed in Table 4; this mean difference approached statistical significance (as the t(32) value equaled 1.
There was no difference between the Swedish and the Greenlandic cohorts [crude mean difference, 0.
 
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