Give a 99.9% confidence interval, for μ1μ2\displaystyle \mu_{{1}}-\mu_{{2}} given the following information.
n1=45\displaystyle {n}_{{1}}={45}, x1=2.41\displaystyle \overline{{x}}_{{1}}={2.41}, s1=0.71\displaystyle {s}_{{1}}={0.71}
n2=20\displaystyle {n}_{{2}}={20}, x2=2.3\displaystyle \overline{{x}}_{{2}}={2.3}, s2=0.86\displaystyle {s}_{{2}}={0.86}

Rounded both solutions to 2 decimal places.
±\displaystyle \pm