To ensure that a sample represents a target population, researchers select a. people at random from the target population. b. a large number of people from one subgroup. c. a slightly larger percentage of people from certain subgroups. d. all of the above.

Identify the example of when situation and time are key to assessing risk of harm in a research study: a study on the efficacy of a behavioral intervention for smoking cessation involves both adults and teenagersasking women if they have had an abortionresearch on the prevalence of hiv-infected individuals in communitiesa survey about sexually transmitted diseases

Calculate the iq of a 20 year old who has the mental age of 25

What effect did increased automobile production have on other industries