Examlex
Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.
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Numerator
The top number of a fraction, showing the number of parts out of the denominator considered.
Chi-square Distribution
A probability distribution that is used to describe the distribution of a sum of the squares of k independent standard normal random variables, often used in hypothesis testing.
Standard Deviation
A measure of the amount of variation or dispersion in a set of values, indicating how much the values differ from the mean.
Sample Variance
A statistical measure of the dispersion or variance within a sample data set.
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