In forming a confidence interval for μ₁ − μ₂, only two assumptions are required: independent samples and sample sizes of at least 30.

Name: In forming a confidence interval for μ 1 − μ 2 , only two assumptions are required: independent samples and sample sizes of at least 30.
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The assumptions are independent samples, equal variances, and either sample sizes are large or the sampled populations are normally distributed.

In Forming a Confidence Interval for μ1 − μ2, Only

In Forming a Confidence Interval for μ₁ − μ₂, Only