Amphetamine has been found in some cases to reduce the startle response of mice. Quinpirole is drug that acts on some of the same neurotransmitters as amphetamine but is more selective and has a different mechanism. Researchers wondered whether quinpirole would reduce the startle response in mice. They injected 20 mice with both injections, Quinpirole and saline on separate days. For example, mouse #1 gets saline and has his startle response tested, then several days later recelves quinpirole and his startle response is tested again. Does quinpirole have an effect on startle response? Type of t-test: H0: H1:.