Given Two Independent Normal Distributions with S₁² - S₂² = $\bar { X } _ { 1 } - \bar { X } _ { 2 }$

question 93

Multiple Choice

Given two independent normal distributions with s₁² - s₂² = 100,?₁ = ?₂ = 50,n₁ = n₂ = 50,the sampling distribution of the mean difference $\bar { X } _ { 1 } - \bar { X } _ { 2 }$
Will have a mean of _________.

• A)1
• B)0
• C)50
• D)100

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