If Participants at the End of a Longitudinal Study Tend

question 93

Multiple Choice

If participants at the end of a longitudinal study tend to be those who were initially higher on some variable, then we have a case of

• A) negative selective survival.
• B) positive selective survival.
• C) elective selective survival.
• D) equally selective survival.

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Definitions:

Normal Distribution

A bell-shaped frequency distribution curve where most of the occurrences take place around the central peak and the probabilities of extreme occurrences taper off equally on both sides.

Continuity Correction

An adjustment made to a discrete distribution when it is approximated by a continuous distribution, often used in binomial distribution approximations.

Standardized Value

A score that has been transformed to have a mean of zero and a standard deviation of one, also known as a z-score, enabling comparison across different scales or distributions.

Wilcoxon Rank Sum Test

A non-parametric statistical test used to compare two independent samples to assess if their population mean ranks differ.