What is Z-Score? Z-score also known as the standard score gives us an idea of how far a data point is from the mean. It indicates how many standard deviations an element is from the mean. Hence, Z-Score is measured in terms of standard deviation from the mean. Simply put, a z-score (also called a standard score) gives an idea of how far it is from the average value of a data point. More technically it is a measure of how many standard deviations below or above the given population mean a raw score. A z-score can be placed on a normal distribution curve. Z-scores are also used as part of Z-tests to test whether an observed outcome is statistically significant. Z-test A Z-test is a type of statistical hypothesis test that is used when the test statistic exhibits a normal distribution and the standard deviation of the population is known. Z-score measures how much a z-score deviates from the mean of the distribution in terms of standard deviation. It tells us about the position of the data value in the normal distribution. It describes the distance between two extreme data points in the distribution very accurately. PEGI 3. SZCZEGÓŁY. RECENZJE. WIĘCEJ. If a long lost arcade game from 1983 resurfaced today, it would be Donut Dodo - a classic 2D platformer from the golden era, tough as nails and challenging for the whole family! Ready to top the high score table? The z-score, also referred to as standard score, z-value, and normal score, among other things, is a dimensionless quantity that is used to indicate the signed, fractional, number of standard deviations by which an event is above the mean value being measured. A Z score, also known as a standard score, represents how many standard deviations a data point is from the mean of a set of data. It provides a way to compare the relative position of a value within a data set, allowing for standardized comparisons among different data sets or within the same data set. Formula: Mówiąc wprost, wynik z-score (nazywany również standardowym wynikiem) daje wyobrażenie o tym, jak daleko jest on od średniej wartości punktu danych. Bardziej technicznie jest to miara tego, ile standardowych odchyleń poniżej lub powyżej danej populacji oznacza wynik surowy. A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of values. Z-score is measured in terms of standard deviations from the mean. YNHf.