Question

type your answer in exactly as one of the following: population, sample, srs, systematic, stratified, cluster, multistage, voluntary, convenience, survey, observation, experiment, undercoverage, response, nonresponse
(answer the multiple choice with a uppercase letter)

1. a researcher randomly assigned students to two groups. one group was assigned to watch a violent television program while the other group watched a nonviolent program. the students behavior was then recorded for incidences of aggressive behavior. which research method is most appropriate?

a. sample study
b. experiment
c. observation

1. identify the type of sampling used:

a teacher splits her classes up by period. she then uses an rng (random number generator) to select 10 students from each period to participate in a survey.

Explanation:

1) Step1: Identify research method

The researcher assigned students to groups (experimental manipulation) to test effect of TV programs on aggression. This is an experiment.

2) Step1: Identify sampling type

The teacher splits classes by period (strata) and selects samples from each stratum. This is stratified sampling.

Answer:

1. B. Experiment
2. stratified