A Developmental Psychologist Developed a Training Program to Encourage Children

question 60

Multiple Choice

A developmental psychologist developed a training program to encourage children to reduce their Internet usage.To examine its efficacy he recruited a sample of 120 children - of whom 60 were aged 11 years and 60 were aged 13.Half of the participants were randomly assigned to the training program and the amount of online usage was measured after one month.Findings were subjected to two-way ANOVA, from which the output was as follows: Which of the following statements is true?

• A)The large number of degrees of freedom associated with the error term is a cause for concern.
• B)The large number of degrees of freedom associated with the error term is only a cause for concern is the assumption of homogeneity of regression to the mean is violated.
• C)The assumption of independence is irrelevant here because the researcher used randomization.
• D)The effect for condition is of medium size by Cohen's standards.
• E)The probability of randomly sampling a difference of this size is .001.

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Definitions:

Machine-Hours

A unit of measure that represents the operational time of a machine, used in allocating manufacturing overhead based on the time machines are run.

Plantwide Predetermined

A rate, often related to overhead costs, that is set before the accounting period begins and applied uniformly throughout an entire plant or organization.

Machine-Hours

A measure of production output or activity level using the total hours machines are operated.

Plantwide Predetermined

A uniform overhead rate used across an entire plant or factory, calculated by dividing estimated overhead costs by an estimated allocation base like labor hours or machine hours.