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Testing for the equality of two population means is the same as testing for the difference between two population means.

Question

Testing for the equality of two population means

Testing for the equality of two population means is the same as testing for the difference between two population means.

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Solution

Yes, that's correct. Testing for the equality of two population means is essentially the same as testing for the difference between two population means. Here's why:

  1. Hypothesis Setting: When you're testing for the equality of two population means, your null hypothesis (H0) is that the two means are equal (μ1 = μ2). The alternative hypothesis (H1) is that the two means are not equal (μ1 ≠ μ2).

  2. Difference Testing: When you're testing for the difference between two population means, your null hypothesis (H0) is that the difference between the two means is zero (μ1 - μ2 = 0). The alternative hypothesis (H1) is that the difference between the two means is not zero (μ1 - μ2 ≠ 0).

As you can see, these are essentially the same tests. In both cases, you're comparing the two means to see if they're the same or not. The only difference is in how you phrase the hypotheses. But mathematically and statistically

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