In a Time Series Design,the Series of Observations Before Treatment

question 26

Multiple Choice

In a time series design,the series of observations before treatment helps reduce threats to internal validity because

• A)a series of observations is more reliable than a single observation.
• B)a series of observations has more validity than a single observation.
• C) if an outside factor is influencing the scores,the effects should be seen before the treatment is administered.
• D) if an outside factor is influencing the scores,it can be stopped before the treatment is administered.

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Definitions:

Poisson Distribution

A probability distribution that expresses the probability of a given number of events occurring in a fixed interval of time or space, assuming these events happen with a known constant mean rate and independently of the time since the last event.

Standard Deviation

An assessment of the range or distribution spread within a set of numbers.

Nuclear Power Plant

A facility that generates electricity by using nuclear reactions to produce heat, which then is used to power steam turbines.

Discrete Random Variables

Variables in statistical analysis that can take on a countable number of distinct values, often representing occurrences.