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Calculator to find out the z-score of a normal distribution, convert between z-score and probability, and find the probability between 2 z-scores.
Z score calculator to calculate a Z score from a raw score. p-value from a Z score or Z score from probability. Z statistic calculator with support for normal distributions with custom mean and sigma. Z score formula and explanation with examples, as well as a Z table with key values. Free online Z table calculator.
The Z-table contains the probabilities that the random value will be less than the Z score, assuming standard normal distribution. The Z score is the sum of the left column and the upper row. What is z-score? A z-score is a statistical measure that quantifies how many standard deviations a data point is away from the mean of the dataset.
Using two Z tables makes life easier such that based on whether you want the know the area from the mean for a positive value or a negative value, you can use the respective Z score table. If you want to know the area between the mean and a negative value you will use the first table (1.1) shown above which is the left-hand/negative Z-table.
A z-score is basically a standardized variable that has been rescaled to have a mean µ of 0 and a standard deviation σ of 1 (which ultimately provides a standard set of z-values - from the z-table - that can be used for easy calculations).
Z-score, otherwise known as the standard score, is the number of standard deviations by which a data point is above the mean. You can use our z-score calculator to determine this value for you. Read on to learn how to calculate the z-score and how to use the z-score table.
The Z-Score Calculator helps to get the z-score of a normal distribution, convert between z-score and probability, and get the probability between 2 z-scores.
