{"data":{"id":"us/10-cfr-appendix-a-to-subpart-b-of-part-429","jurisdiction":"us","citation":"10 CFR Appendix A to Subpart B of Part 429","heading":"Appendix A to Subpart B of Part 429—Student's t-Distribution Values for Certification Testing","body":"Figure 1—t-Distribution Values for Certification Testing\n[One-Sided]\nDegrees of freedom (from Appendix A) Confidence Interval\n90% 95% 97.5% 99%\n1 3.078 6.314 12.71 31.82\n2 1.886 2.920 4.303 6.965\n3 1.638 2.353 3.182 4.541\n4 1.533 2.132 2.776 3.747\n5 1.476 2.015 2.571 3.365\n6 1.440 1.943 2.447 3.143\n7 1.415 1.895 2.365 2.998\n8 1.397 1.860 2.306 2.896\n9 1.383 1.833 2.262 2.821\n10 1.372 1.812 2.228 2.764\n11 1.363 1.796 2.201 2.718\n12 1.356 1.782 2.179 2.681\n13 1.350 1.771 2.160 2.650\n14 1.345 1.761 2.145 2.624\n15 1.341 1.753 2.131 2.602\n16 1.337 1.746 2.120 2.583\n17 1.333 1.740 2.110 2.567\n18 1.330 1.734 2.101 2.552\n19 1.328 1.729 2.093 2.539\n20 1.325 1.725 2.086 2.528","path":["Title 10—Energy","CHAPTER II—DEPARTMENT OF ENERGY","SUBCHAPTER D—ENERGY CONSERVATION","PART 429—CERTIFICATION, COMPLIANCE, AND ENFORCEMENT FOR CONSUMER PRODUCTS AND COMMERCIAL AND INDUSTRIAL EQUIPMENT","Subpart B—Certification"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-10.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:09Z","sha256":"3dbb484ea8092c5fbf7bbf5a8f667dd147977cdc6cc89918073063fa7dc65506","source_id":"us-cfr","stale":true,"prev":"us/10-cfr-429.76","next":"us/10-cfr-appendix-b-to-subpart-b-of-part-429"},"notice":"GroundRules: Original legal text. Not legal advice."}