ce calculator
Free calculate 90% confidence intervals for population means and proportions. Get instant, accurate results with our easy-to-use calculator.
Confidence Interval Settings
90% Confidence Interval
Enter data to calculate confidence interval
About 90% Confidence Intervals
Interpretation
- • 90% confidence level
- • α = 0.10 significance level
- • Critical value: ±1.645
- • Narrower than 95% CI
When to Use
- • Preliminary analysis
- • Exploratory research
- • When precision is less critical
- • Quick estimates