Examlex
What does the current evidence say about the effects of psychotherapy, and which orientation is the most effective?
Null Hypothesis
A statement in hypothesis testing that there is no effect or no difference, and it is the hypothesis that researchers aim to test against.
Precision Instrument
A tool or device designed to measure or record quantities with high accuracy and minimal error.
Population Variance
The average of the squared differences from the Mean, representing the variance within a whole population.
Confidence Interval
A range of values, derived from sample statistics, that is believed to contain the true parameter of the population with a certain level of confidence.
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