Frequently Asked Questions

Find answers to common questions about using our statistics calculators and understanding statistical analysis.

General Questions

Using the Calculators

Statistical Methods

Accuracy and Reliability

Troubleshooting

Still Have Questions?

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Frequently Asked Questions

General Questions

Is the Online Statistics Calculator really free?

Do I need to create an account to use the calculators?

Is my data private and secure?

Can I use these calculators for my homework or research?

What browsers and devices are supported?

Using the Calculators

How do I input data into the calculators?

What's the maximum dataset size I can analyze?

Can I save or export my results?

Do you provide sample datasets to practice with?

What if I get an error message?

Statistical Methods

Which statistical test should I use for my data?

What does "p-value" mean?

What's the difference between Pearson, Spearman, and Kendall correlation?

When should I use a t-test vs. z-test?

What confidence level should I use?

Accuracy and Reliability

How accurate are your calculations?

Can I trust these results for professional research?

What statistical methods and algorithms do you use?

Do you check statistical assumptions?

What if my results differ from another calculator or software?

Troubleshooting

The calculator isn't loading or is running slowly

My CSV file won't upload

Charts are not displaying correctly

Still Have Questions?