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. four groups of randomly selected people are assigned a different diet. after six months, the blood pressures of each group are compared. which research method is most appropriate?

a. sample study
b. experiment
c. observation

1. source of bias that occurs when you ask people who are easy to ask

Explanation:

Step1: Identify research method for 1)

The problem involves assigning diets (interventions) to groups and comparing outcomes, which is an experiment.

Step2: Identify bias source for 2)

Asking easily accessible people is convenience sampling, causing convenience bias.

Answer:

1. B. Experiment
2. convenience