ression 7. An advertising agency is testing the ef- 8, y is fectiveness of a new

Question

ression 7. An advertising agency is testing the ef- 8, y is fectiveness of a new commercial. They are al? trying out the commercial in three different time lengths (15, 30, and 60 seconds) and two formats (animated vs. live action). Each test audience will rate the product after see- ing the commercial shown in one way. Which description of this study is correct? (a) An experiments with 2 factors (length and format), one having 3 levels (15, 30, 60) and the other having 2 levels (ani- mated and live) for 6 treatments. (b) An experiment with 2 factors (length and format) at 5 levels (15, 30, 60, ani- mated, and live) for 5 treatments. cn experiment with 1 factor (length) blocked by format with 3 levels (15, 30, ents 60) ent (d) A sample survey with two questions and one response. an (e) A sample stratified by length and for- mat. ght per (8. Forty students took a test on which

Explanation / Answer

In this situation, we want to examine or see the effects of varying two factors(time length and format). So, obviously it is a factorial experiment.

And we are testing the time factor at three levels(15,30 and 60 seconds) and format factor at two levels(animated and live)

Hence, description a) is correct for this study that it is an experiment with two factors(length and format), one having 3 levels(15,30,60 sec) and other having 2 levels(live and animated) for 6(2*3) treatments.

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