Examlex
A percentile rank of _____ indicates performance at the median of the reference group.
Probability Density Function
A function that describes the likelihood of a continuous random variable falling within a particular range of values.
Total Area
In statistical terms, often refers to the entirety of the area under a probability distribution curve, which equals 1 or 100%.
Sampling Distribution
The probability distribution of a given statistic based on a random sample, used to make inferences about a population.
Nonnormal Population
A population distribution that does not fit the normal (bell-shaped) distribution pattern, often having skewness or kurtosis.
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