Question: One sample has n 5 4 and a second sample has n 5 8. If the pooled variance for the two samples is 24, then

One sample has n 5 4 and a second sample has n 5 8.

If the pooled variance for the two samples is 24, then what is the estimated standard error for the sample mean difference?

a. 9

b. 4

c. 3

d. 2

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