The Screen Below Shows The $95 \%$ Confidence Interval For $\left( \mu _ { 1 } - \mu _ { 2 } \right)$

question 90

Essay

The screen below shows the $95 \%$ confidence interval for $\left( \mu _ { 1 } - \mu _ { 2 } \right)$ .


What does the interval suggest about the relationship between $\mu _ { 1 }$ and $\mu _ { 2 }$ ?

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