Una was asked to write about predicting population means by taking the means of samples. She recorded a list of some statements generated from her classmates.Which statements are true? Select three choices.

Sample means tend to cluster around the population mean, so the population mean is likely to fall between the smallest and largest sample means (A), and it is unlikely to equal either extreme (B). The range is found by subtracting the least sample mean from the greatest sample mean (E). Small variation makes sample means more useful for prediction, not unusable, and taking more random samples generally improves a prediction—so C and D are false.

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