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13 cards from this deck
Average value of a characteristic in entire population
μ\muμ
xˉ\bar{x}xˉ
μ=∑xN\mu = \frac{\sum x}{N}μ=N∑x
Total number of data points in the population
xˉ=∑xn\bar{x} = \frac{\sum x}{n}xˉ=n∑x
Number of data points in the sample
When impractical to measure entire population
Range in which the population mean likely falls
xˉ±z×sn\bar{x} \pm z \times \frac{s}{\sqrt{n}}xˉ±z×ns
Z-score for desired confidence level
Sample standard deviation
1.96
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