<i class="fas fa-chart-bar"></i> Confidence Interval Calculator<i class="fas fa-bullseye"></i> Sample Mean (x̄) <i class="fas fa-wave-square"></i> Standard Deviation (σ) <i class="fas fa-users"></i> Sample Size (n) <i class="fas fa-check-circle"></i> Confidence Level 90% 95% 99% Calculate Interval