Researchers usually test the hypothesis $H _ { o } : \bar { x } _ { 1 } - \bar { x } _ { 2 } = 0$ with an alternative hypothesis of $H _ { a } : \bar { x } _ { 1 } - \bar { x } _ { 2 } \neq 0$ rather than using a one-sided alternative.

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The Answer of Researchers usually test the hypothesis $H _ { o } : \bar { x } _ { 1 } - \bar { x } _ { 2 } = 0$ with an alternative hypothesis of $H _ { a } : \bar { x } _ { 1 } - \bar { x } _ { 2 } \neq 0$ rather than using a one-sided alternative.

Researchers Usually Test the Hypothesis Ho:xˉ1−xˉ2=0H _ { o } : \bar { x } _ { 1 } - \bar { x } _ { 2 } = 0Ho​:xˉ1​−xˉ2​=0

Researchers Usually Test the Hypothesis $H _ { o } : \bar { x } _ { 1 } - \bar { x } _ { 2 } = 0$