The Standard Deviation Of $\bar { X } _ { 1 } - \bar { X } _ { 2 }$

question 78

Multiple Choice

The standard deviation of $\bar { X } _ { 1 } - \bar { X } _ { 2 }$ is also called the:

• A) standard error of the difference between two sample means.
• B) standard deviation of the difference between the population means.
• C) normal approximation to the difference of two binomial random variables.
• D) None of these choices.

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