SCENARIO 12-4 A Computer Used by a 24-Hour Banking Service Is Supposed

question 109

Multiple Choice

SCENARIO 12-4
A computer used by a 24-hour banking service is supposed to randomly assign each transaction to one of 5 memory locations.A check at the end of a day's transactions gave the counts shown in the table to each of the 5 memory locations,along with the number of reported errors.
The bank manager wanted to test whether the proportion of errors in transactions assigned to each of the 5 memory locations differ.
-Referring to Scenario 12-4,the degrees of freedom of the test statistic is

• A)4
• B)8
• C)10
• D)448

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Definitions:

Random Assignment

A method used in experiments to place participants into either a control or experimental group, ensuring that each has an equal chance of being assigned to any given group.

Blind Observations

Observational research in which the observers are unaware of the subjects' conditions or the outcomes expected by the researchers, to prevent bias.

Independent Variable

In an experiment, it is the variable that is manipulated or changed by the researcher to observe its effects on the dependent variable.

Random Assignment

A method used in experiments to place participants into groups in a way that each has an equal chance of being assigned to any group, minimizing biases.