Concept explainers
To find out which design is this experiment from the options.
Answer to Problem 9PT
Option (d) is the correct option.
Explanation of Solution
In the question, it is given that if TVs ads are more effective when they are longer or repeated more often or both. Thus, an experiment was conducted based on this. Thus, in the experiment conducted there are four treatment groups using two explanatory variables, that is, length of
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