What is the primary difference between pretest/posttest designs and within-groups designs? The number of participants used.

The number of times the dependent variable is measured

The number of levels of the independent variable participants are exposed to

There is no difference between the two designs

What recommendations would you give to your local community to to decrease the local effects of human impact on the environment? list 2 recommendations and how they will positively impact your community. 3. what recommendations would you give to the global governments to decrease the global effects of human impact on the environment? list 2 recommendations and how they will positively impact our planet.