For each of the following, calculate the pooled variance and the estimated standard error for the sample mean difference
The first sample has n=4 scores and a variance of s2=17, and the second sample has n=8 scores and a variance of s2=27.
Now the sample variances are increased so that the first sample has n=4 scores and a variance of s2=68, and the second sample has n=8 scores and a variance of s2=108.
Comparing your answers for Parts a and b, how does increased variance influence the size of the estimated standard error?
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