Examlex
A researcher is conducting a study to test the hypothesis that viewing family photos (as compared with viewing photos of strangers) prompts more autobiographical memories. State the null and alternative hypotheses for this study.
Normal Distribution
A bell-shaped curve that describes the spread of a variable where most observations cluster around the central peak and the probabilities for values farther from the mean taper off symmetrically.
Probability
Probability measures the likelihood of a given event occurring, ranging from 0 (impossibility) to 1 (certainty).
Cluster Sample
A sampling technique where the population is divided into groups, or clusters, and a sample of these clusters is selected to represent the population.
Simple Random Sample
A sample drawn in such a way that every element of the population has an equal chance of being selected.
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