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 2) identify the type of sampling used: assign each car in a dealership a number and then use a random - number table to select the cars to be inspected.

Explanation:

Question 1

In this scenario, people are assigned different diets (a treatment) and then their blood pressures are compared. An experiment involves manipulating an independent variable (diet here) to observe its effect on a dependent variable (blood pressure). A sample study is about selecting a sample from a population, and observation is just watching without intervention. So the appropriate method is an experiment, corresponding to option B.

When each unit (car) is assigned a number and a random - number table is used to select units, this is a Simple Random Sample (SRS). In SRS, every unit in the population has an equal chance of being selected, and using a random - number table to select from numbered units fits this definition.

Answer:

B

Question 2