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# level of measurement

A media consulting company installs software on the set-top boxes of 100,000 U.S. cable TV customers; every ten seconds, the software records what channel is being viewed. These cable customers have agreed to participate, providing the media company with demographic data, such as age, gender, and income. Each week, the media company publishes rankings of each cable channel.
I. What is the population?
II. What is the sample?
III. Is the study observational or experimental? Justify your answer.
IV. If observational, identify ALL variables. If experimental, identify ALL independent and dependent variables.
V. For each of the variables identified in part IV, list which of the four levels/scales of measurement was used to obtain data on these variables?
VI. Classify each of the variables identified in part IV as either attribute or numerical.

#### Solution Preview

I. What is the population? All of the Americans who have cable TV
II. What is the sample? 100,000 randomly selected cable tv customers
III. Is the study observational or experimental? Justify your answer. Let us first go over the key elements of each study design to be able to determine what type of study is it. In experimental, we need to randomly assign the sample to groups - one group is the control group, and one group is the experimental group. This ...

#### Solution Summary

The levels of measurements are examined. Whether the study is observational or experimental is determined.

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