I need to know the answer to this statistcs question

Statistics
Tutor: None Selected Time limit: 1 Day

IN two separate studies, the actual difference between the means of a treated group and an untreated group is 3 points. However, in one study, the σm1-m2 is very large and so the 3 points is not found to be significant. In the other study, the σm1 - m2 is very small and so the 3 points is found to be be significant. What might have caused this big difference in the σm1-m2 for the two studies?

May 31st, 2015

 the difference was caused by the wide spread of data presented as 0m1-0m2.....................................................................................................

May 31st, 2015
ARE YOU 100% THIS IS CORRECT BECAUSE LAST TIME I FAILED MY QUIZ FROM SOME OF YOU GUYS ANSWERS??


Jun 1st, 2015

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May 31st, 2015
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May 31st, 2015
Dec 6th, 2016
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