TABLE 11-8 An Important Factor in Selecting Database Software Is the Time

question 76

Short Answer

TABLE 11-8
An important factor in selecting database software is the time required for a user to learn how to use the system. To evaluate three potential brands (A, B and C) of database software, a company designed a test involving five different employees. To reduce variability due to differences among employees, each of the five employees is trained on each of the three different brands. The amount of time (in hours) needed to learn each of the three different brands is given below:

Below is the Excel output for the randomized block design:

-Referring to Table 11-8, what is the p-value of the test statistic for the randomized block F test for the difference in the means?

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Definitions:

Confounding Variables

Factors other than the independent variable(s) that are unequal across groups.

Random Assignment

A method used in experiments to ensure that every participant has an equal chance of being assigned to any given group, thereby reducing bias.

Experimenter Bias

A phenomenon that occurs when a researcher’s preconceived notions or expectations in some way influence participants’ behavior and/or the researcher’s interpretation of experimental results.

Placebo Effect

A psychological phenomenon where a person experiences a perceived improvement in condition after receiving a treatment that has no therapeutic effect.