It is used to describe the normal distribution. A positive value represents the score above the mean (right tail) and a negative score represents the score below the mean (left tail). If a z-score is 1, then it represents a value that is one standard deviation from the mean. If a z-score is zero, then the data point's score is identical to the mean. In other words, z-score is the number of standard deviations there are between a given value and the mean of the data set. A z-score measures the distance between an observation and the mean, measured in units of standard deviation. In statistics and probability, it is also called standard score, z-value, standardized score or normal score. Input : Three real numbers as random member, mean and standard deviation of population or sample data
z-score calculator will give the standard score for a data point.Press the " GENERATE WORK" button to make the computation.
The values can be copied from a text document or a spreadsheet. These values must be real numbers and may be separated by commas. Enter an unstandardized raw value, mean of normal distribution, and the standard deviation of the population in the box.It is necessary to follow the next steps: The result will describe the measure of how many number of standard deviations between a value and the mean. It's an online statistics and probability tool requires an unstandardized raw value, mean of normal distribution, and the standard deviation.
It also shows how to calculate the p-value from the z-table to find the probability of X in the normal distribution. Z-score calculator, p-value from z-table, left tail, right tail, two tail, formulas, work with steps, step by step calculation, real world and practice problems to learn how to find standard score for any raw value of X in the normal distribution.