MKTG202 Lecture Notes - Lecture 7: Random Assignment, Time Series, Internal Validity
9 Oct 2018
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Allow a single independent variable to be manipulated to observe its effect on a single dependent variable. Impact of price on sales: factorial experimental designs. Allow for interaction of two or more independent variables. Impact of price and advertising on sales: repeated measures. Subjects are exposed to several treatments to eliminate any problems due to subject differences: a group of subject is administered a treatment and them measured (or observed) No attempt is made to randomly assign subjects to the groups, not does the design provide for any additional groups as comparisons. One group, pre-post: one group is given a pre-treatment measurement or observation, the experimental treatment mktg202 page 1, one group is given a pre-treatment measurement or observation, the experimental treatment and a post treatment measurement or observation. The post treatment measures are compared with their pre-treatment measures. Static group: two intact groups are used, but only one of them is given the experimental treatment.
