Confidence Level: ${confidenceLevel.toFixed(0)}%

Confidence Interval: [${confidenceIntervalLower.toFixed(2)}, ${confidenceIntervalUpper.toFixed(2)}]

Confidence Score: ${confidenceScore.toFixed(1)}%

`; resultSection.innerHTML = resultText; resultSection.style.display = 'block'; pdfButton.disabled = false; }; const downloadPDF = () => { if (!currentResults.sampleSize || !resultSection.innerText) { errorMessage.textContent = 'No results available to download.'; errorMessage.style.display = 'block'; return; } try { const { jsPDF } = window.jspdf; if (!jsPDF) { console.error('jsPDF is not loaded.'); errorMessage.textContent = 'PDF generation failed. Please try again.'; errorMessage.style.display = 'block'; return; } const doc = new jsPDF(); doc.setFont('helvetica', 'bold'); doc.setFontSize(16); doc.text('Confidence Level Score Converter', 20, 20); doc.setLineWidth(0.5); doc.line(20, 25, 190, 25); doc.setFont('helvetica', 'normal'); doc.setFontSize(12); doc.text(`Sample Size: ${currentResults.sampleSize.toFixed(0)}`, 20, 40); doc.text(`Mean: ${currentResults.mean.toFixed(2)}`, 20, 50); doc.text(`Standard Deviation: ${currentResults.stdDev.toFixed(2)}`, 20, 60); doc.text(`Confidence Level: ${currentResults.confidenceLevel.toFixed(0)}%`, 20, 70); doc.text(`Confidence Interval: [${currentResults.confidenceIntervalLower.toFixed(2)}, ${currentResults.confidenceIntervalUpper.toFixed(2)}]`, 20, 80); doc.text(`Confidence Score: ${currentResults.confidenceScore.toFixed(1)}%`, 20, 90); doc.setDrawColor(200); doc.rect(15, 35, 180, 60); doc.save('confidence_score.pdf'); } catch (error) { console.error('PDF generation error:', error); errorMessage.textContent = 'Failed to generate PDF. Please try again.'; errorMessage.style.display = 'block'; } }; const resetForm = () => { converterForm.reset(); resultSection.innerHTML = ''; resultSection.style.display = 'none'; errorMessage.style.display = 'none'; pdfButton.disabled = true; currentResults = { sampleSize: 0, mean: 0, stdDev: 0, confidenceLevel: 0, confidenceIntervalLower: 0, confidenceIntervalUpper: 0, confidenceScore: 0 }; sampleSizeInput.focus(); }; convertButton.addEventListener('click', calculateConfidenceScore); resetButton.addEventListener('click', resetForm); pdfButton.addEventListener('click', downloadPDF); converterForm.addEventListener('submit', (e) => { e.preventDefault(); calculateConfidenceScore(); }); }); })();