For two independent samples drawn from normally distributed populations with a pooled variance Sp = 17.5, df1 = 21, and df2 = 14, what is
For two independent samples drawn from normally distributed populations with a pooled variance Sp = 17.5, df1 = 21, and df2 = 14, what is the estimated standard error of the mean difference? O 1.25 1.11 O 1.40 1.64
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