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A mathematical model that uses financial ratios and eight variables to identify whether a company has manipulated its earnings. The variables are constructed from the data in the company's financial statements and, once calculated, create an M-Score to describe the degree to which the earnings have been manipulated.
Z Score also known as Standard Score, is the method of calculating how many standard deviations in a data set is above or below the mean. The distance between the mean and a given Z score in every normal distribution cuts off a fixed ratio of the total area below the curve. Z scores are particularly informative when the distribution to which they refer is normal.