1. Illustrate the terms parameter and statistics. Be sure the concepts of the population and sample are included in your definitions.
2. Dawns & Abwender (2002) found neurological deficit in soccer players who're routinely hit on the head with soccer balls compared with swimmers who're also athletes but who're not regularly hit on the head. Is this an ex of an experimental or a non-experimental study?
Hint: Find out is there cause or effect relationship (control and manipulation) then decide if this is an experiment or not.