# Construct two 99% confidence intervals for \mu_{X}=\mu_{Y} using the data of Case Study 9.2.3, first assuming the variances are equal, and then assumi

Construct two 99% confidence intervals for $$\displaystyle\mu_{{{X}}}=\mu_{{{Y}}}$$ using the data of Case Study 9.2.3, first assuming the variances are equal, and then assuming they are not.

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doplovif
Unequal variances: (-9.4863,2.8863)
Equal Variances: (-10.6751,4.0751)