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Questions and Answers
What is the formula for standard deviation?
What is the formula for standard deviation?
- $STDEV = \frac{\sum(X - \bar{X})}{n}$
- $STDEV = \sqrt{\frac{\sum(X - \bar{X})^2}{n-1}}$ (correct)
- $STDEV = \sqrt{\frac{\sum(X - \bar{X})}{n-1}}$
- $STDEV = \frac{\sum(X - \bar{X})^2}{n-1}$
What does the Z-Statistic measure?
What does the Z-Statistic measure?
- The difference between the smallest and largest values of a set of measurements
- The relative variability of a sample
- How significantly an observed sample mean deviates from a population mean (correct)
- The spread of a set of measurements
What does the Coefficient of Variability (CV) measure?
What does the Coefficient of Variability (CV) measure?
- The spread of a set of measurements
- The midpoint of a set of data
- The relative variability (or relative dispersion) of a sample (correct)
- The difference between the smallest and largest values of a set of measurements
What is the formula for the mean (average)?
What is the formula for the mean (average)?
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What does the Range measure?
What does the Range measure?
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