A group of researchers investigated the effect of media usage (whether or not su

Question

A group of researchers investigated the effect of media usage (whether or not subjects watch television or use the Internet) in the bedroom on "Tiredness" during the day (measured on a 50 point scale a. Identify each of the variables, state whether the variables are quantitative or categorical, and identify each variable as either explanatory or response variables. nterviewed b. To collect these data, the researchers randomly selected homes to visit and i the adult member of the household whose birthday was nearest. Is this an experiment or an observational study? Briefly explain.

Explanation / Answer

a) The variables in the study are-

Effect of Media Usage- Categorical- Response

Tiredness- Quantitative- Explanatory

b)

In an observational study, we measure or survey members of a sample without trying to affect them

In a controlled experiment, we assign people or things to groups and apply some treatment to one of the groups, while the other group does not receive the treatment

In the case at hand, the researchers are just surveying homes and getting the response without affecting any of the groups. So, it is an observational study

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