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What is variability

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Reference no: EM131012180

• What is variability? What are the three types of variability? Why is variability valuable as a descriptive tool? Explain how to calculate and give an example for each type.

• What is the most frequently used measure of variability? What does this measure represent?

• What is an unbiased estimate and why are unbiased estimates usually "best practice" in statistics?

• How are the standard deviation and the variance the same? How are they different?

• What are the degrees of freedom for sample variance?

• What does the standard deviation measure?

Reference no: EM131012180

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