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)

Question

Quizplus · Accepted Answer

The confidence interval is calculated using the formula for the difference between two means with known standard deviations and sample sizes.

Using Technology, Construct the Confidence Interval for the Difference μ1−μ2\mu _ { 1 } - \mu _ { 2 }μ1​−μ2​

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