Provide an Appropriate Response $x$ Is a Normally Distributed Variable on Each of Two Populations

question 84

Essay

Provide an appropriate response.
-Suppose that $x$ is a normally distributed variable on each of two populations. Independent samples of sizes $n _ { 1 }$ and $n _ { 2 }$ , respectively, are selected from the two populations. Explain the difference between $\bar { x } _ { 1 } - \bar { x } _ { 2 }$ and $\mu _ { 1 } - \mu _ { 2 }$ .

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