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The following information was obtained from independent random samples. Assume normally distributed populations with equal variances. Sample 1 Sample 2 Sample mean 49 44 Sample

The following information was obtained from independent random samples. Assume normally distributed populations with equal variances.

	Sample 1	Sample 2
Sample mean	49	44
Sample variance	65	171
Sample size	10	18

The standard error of x₁ - x₂ is _____.

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