David and Alexandra Both Take Part in a Research Study

question 55

Multiple Choice

David and Alexandra both take part in a research study that is investigating the effects of sleep deprivation on reaction time.David is kept awake for 24 hours straight,while Alexandra follows her normal sleep routine.In this study,David is part of the

• A) hypothesis group.
• B) experimental group.
• C) control group.
• D) dependent variable group.

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Definitions:

Random Selection

A process of choosing a sample from a population such that every individual has an equal chance of being selected.

Stratified Random Sample

A sampling method where the population is divided into subgroups (strata) that share similar characteristics, and random samples are then taken from each subgroup to ensure representation across the population's diversity.

Systematic Random Sample

A sampling method where elements are selected from an ordered sampling frame using a starting point and a fixed periodic interval.

Subset

A set containing some or all elements of another set, without any additional elements.