1. Researchers are interested in determining whether victims of violent crime fare better psychologically when they interact throughout the legal process with a victim advocate. They survey a group of victims - some who interacted with a victim advocate during their legal process and others who didn't - to report their number of experienced trauma related symptoms 6 months after their legal process ended.

a. what type of t-test is required for this experiment? b. what is the null hypothesis for this experiment?

2. Researchers are interested in determining whether the types of resources available will impact how far someone travels to access those resources. They survey a group of people as to how far they traveled to attend two separate out-reach events, one with Legal Services present and one without.

a. What type of t-test is required for this experiment?

b. What is the null hypothesis for this experiment?

3. Researchers are interested in determining whether interactions with the community would improve with implicit bias training for police officers. They survey multiple people in one community before the implicit bias training and the same people after the implicit bias training to rate the quality of their interactions with police officers on a scale of 1 (awful) to 7 (the best ever).

a. What type of t-test is required for this experiment?

b. What is the null hypothesis for this experiment?