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Solve the equation by completing the square.
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.
Sampling Distribution
The layout of statistical probabilities derived from a random sample.
Sample Mean
The average value of a sample set of numbers, calculated by summing all the observations and dividing by the number of observations.
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