Z-table lookup: Find the percentage of values below a given z-score in a standard normal distribution.
A tool to quickly calculate probabilities in a normal distribution from a z-score table.
You can either use the slider or enter a z-score value in the input field to find, among other things, the percentage of values below or above this value in a standard normal distribution.
You can also:
- Compute probabilities between two z-scores.
- Calculate a z-score by entering a test value, a mean value and a standard deviation.
- Read and understand how to use a positive and negative z-table.