Standard error and variability

Reference no: EM1394167

One sample has n = 8 scores with SS = 45 and the second sample has n = 4 scores with SS = 15.

In another set, one sample has n = 8 scores with SS = 150 and the second sample n = 4 scores with SS = 90.

How to calculate expected difference between the samples means, and how does larger variability affect the size of the standard error for the sample mean difference?

Reference no: EM1394167

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