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Dr. Jefferson is a psychologist interested in 4-year-old Shawn's knowledge of the differences between animals and vehicles. The psychologist gives Shawn a multiple-choice picture test in which he must write the letter of the correct answer on a separate piece of paper. However, Shawn has trouble identifying and writing some letters. On two separate occasions, Shawn receives the same score on the test. This method has _____ validity and _____ reliability.
Distribution
In statistics, distribution describes how the values of a dataset or variable are spread or dispersed.
Coefficient
A numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g., 4 in 4x).
Model
A simplified representation of a system or phenomenon that describes its structure or function, often used in simulations.
Studentized Residuals
Residuals divided by an estimate of their standard deviation, used for identifying outliers in regression analysis.
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