Calculate the Degrees of Freedom Associated with a Small-Sample Test $\left( \mu _ { 1 } { } ^ { \prime } \mu _ { 2 } \right)$

question 63

Multiple Choice

Calculate the degrees of freedom associated with a small-sample test of hypothesis for $\left( \mu _ { 1 } { } ^ { \prime } \mu _ { 2 } \right)$ , assuming $\sigma _ { 1 } { } ^ { 2 } \neq \sigma _ { 2 } ^ { 2 }$ and $n _ { 1 } = n _ { 2 } = 20$ .

• A) 31
• B) 15
• C) 30
• D) 33

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