We are $95\%$ confident that there is no difference in the annual average electric bill between the Midwest and the Southeast.

We are $95\%$ confident that the average annual electric bill from those in the Midwest and the Southeast was between $$193\mathrm{.}02$ and $$202\mathrm{.}04.$

We are $95\%$ confident that the average monthly electric bill from those in the Midwest and the Southeast was between $$193\mathrm{.}02$ and $$202\mathrm{.}04.$

We are $95\%$ confident that the difference in the annual average electric bill between those in the Midwest and Southeast was between $$193\mathrm{.}02$ and $$202\mathrm{.}04.$