A z-test is statistical test used to determine whether two population means are different when the variances are known and the sample size is large. What Is a Z-Test? A z-test is a statistical test ...

Z-score is a standard measurement used in statistical analysis that looks at data with a normal distribution. It provides a standard unit of measurement for placing your data on a common scale. It ...

Z-score is an extremely useful technique not only for screening, but also for stock picking and portfolio structuring. A backtest shows that using a composite Z-score, based on PC, PTBV and PE ratios, ...

A z-statistic, or z-score, measures relative discounts and relative premiums for closed-end funds. Z-scores can add context to a closed-end funds’ current discounts and premiums. For a premium, a ...

Z-scores measure how far a closed-end fund's current discount status is from its average premium or discount. Writers will often highlight the probability of a given Z-score, usually to bolster an ...