Z-Score Calculator
Compute z-scores and probabilities using the standard normal distribution.
About This Calculator
The Z-Score Calculator standardizes data points by showing how many standard deviations a value is from the mean. It also calculates probabilities using the standard normal distribution.
How to Use
- Enter the value, mean, and standard deviation
- Click Calculate to see the z-score
- View the probability (percentile) for the z-score
- Use for hypothesis testing and data comparison
Practical Use Cases
- Statistics: Standardize data for comparison
- Quality Control: Identify outliers
- Testing: Calculate percentile ranks
- Finance: Compare returns across investments
- Research: Perform hypothesis testing
? Frequently Asked Questions
How accurate is this
This calculator uses standard formulas and provides accurate results for typical use cases. For professional or critical applications, always verify results with certified professionals or official sources.
Is this calculator free to use?
Yes, this Statistics is completely free to use with no registration required. You can use it as many times as needed without any limitations.
Can I use this on mobile devices?
Absolutely! This calculator is fully responsive and works perfectly on smartphones, tablets, and desktop computers.
How do I interpret the results?
The results are displayed clearly with appropriate units. Refer to the "About This Calculator" section for detailed information.