Examlex
Flash Sales provided the following information. Calculate the return on investment.
Population Mean
The average of a set of values in the entire population.
Sample Standard Deviation
A measure of the amount of variation or dispersion of a set of values from a sample, indicating how spread out the values are from the mean of the sample.
Z Value
A Z value is a statistical measure representing the number of standard deviations a data point is from the mean.
Confidence Level
A statistical measure expressed as a percentage that indicates the probability that a given interval contains the true parameter or result.
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