Examlex
Resource use per person is higher in the United States than it is in middle-income countries like China.
Mean
The arithmetic average of a set of numbers, calculated by adding up all the values and dividing by the count of numbers.
Variance
A statistical measure that determines the spread of numbers in a data set by calculating the mean of the squared differences from the mean.
Standard Normal
A normal distribution with a mean of zero and a standard deviation of one, commonly used in statistical analysis.
P(Z < 2)
The probability that a value Z, on a standard normal distribution, is less than 2.
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