​ \frac{5}{2}\mathrm{g}-\frac{1}{2}\m athrm{g}= 2 5 ​ g− 2 1 ​ g simlily

Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?

Precalculus question, image attached.

What’s the range cuz i can’t find it?