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When each student in a random sample of students from a particular university was asked to tap a pencil.......

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When each student in a random sample of students from a particular university was asked to tap a pencil.......

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from the EXCEL table, we know the average of dominant is M1 = 82.917
and the average of nondominant is M2 = 76.5
Let Md=M1 - M2 = 82.917 - 76.5 = 6.42
Ho: M1 = M2 or Md = 0
Ha: M1 > M2 or Md > 0

We need to compute the standard error of the difference between means, Smd.
From the attached EXCEL, we calculate variance of two samples:
Variance1 =299.036 and Variance2 = ...

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