Using the Sales Data on a Particular Model of a DVD

question 46

Multiple Choice

Using the sales data on a particular model of a DVD player shown below in Table 2, answer questions
Table 2
$\begin{array}{|l|c|c|c|}\hline \text { Month } & \text { Sales } & \text { Forecast 1 } & \text { Forecast 2 } \\\hline \text { Jan } & 35 & 30 & 33 \\\hline \text { Feb } & 29 & 28 & 32 \\\hline \text { Mar } & 39 & 43 & 35 \\\hline \text { Apr } & 42 & 40 & 45 \\\hline \text { May } & 51 & 48 & 52 \\\hline \text { Jun } & 56 & 55 & 52 \\\hline\end{array}$
-The mean absolute deviation (MAD) for forecast 1 is:

• A) less than or equal to 2.0.
• B) more than 2.0 but less than or equal to 2.5.
• C) more than 2.5 but less than or equal to 3.0.
• D) more than 3.0 but less than or equal to 3.5.

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Definitions:

Quasi-Experimental Designs

Research designs that seek to establish causal relationships between variables but lack the full control or random assignment typical of true experiments.

Selection Criteria

The specific guidelines or requirements used to determine which individuals or cases are included or excluded from a study or analysis.

Initial Groupings

The preliminary categorization or division of subjects, items, or variables based on specific criteria at the start of a study or analysis.

Selection-By-Threat Interaction Effect

A situation in research where the selection of participants and specific threats to validity interact, affecting the experimental results.