Using Technology, Construct the Confidence Interval for the Difference $\mu _ { 1 } - \mu _ { 2 }$

question 21

Multiple Choice

Using technology, construct the confidence interval for the difference $\mu _ { 1 } - \mu _ { 2 }$ for the given level and values of $\bar { x } _ { 1 } , \bar { x } _ { 2 } , s _ { 1 } , s _ { 2 } , n _ { 1 }$ , and $n _ { 2 }$ .
Level $98 \% , \bar { x } _ { 1 } = 26.4 , \bar { x } _ { 2 } = 22.9 , s _ { 1 } = 7.0 , s _ { 2 } = 5.4 , n _ { 1 } = 20$ , and $n _ { 2 } = 21$

• A) (2.869, 0.666)
• B) (-0.444, 7.444)
• C) (-1.271, 8.271)
• D) (-1.232, 8.231)

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