Hi! These questions are confusing to me. Can you help me understand what to do for the solution?

nearly everyone scored a 95% or higher, this would be an example of what type ofeffect? Am A merger of both the posttest — only control group design and the pretest/posttestcontrol group design is called the ANSWER. I If a researcher collected grades in a class for data analysis and then realized that4) If the experimenter knows who is assigned to each condition but the subjects do notknow the condition to which they’ve been assigned, this is an example of g The extent to which the results of an experiment can be attributed to themanipulation {9 the independent variable rather than to some confounding variable is known as ANSWER.