Thống kê Xã hội học: Khoảng ước lượng cho trung bình

Round-15 hunt: picked; source: named-course long-video search (r15); channel screens (sellers/exam/re-upload/devotional/vendor/events), provenance check, vendor/seller/devotional recheck and quality tier C + tier-C depth check passed; strict per-title check + final strict pass; oEmbed verified.

A 18-minute video from Hoang Long Ngo: “Thống kê Xã hội học: Khoảng ước lượng cho trung bình”.

Video by Hoang Long Ngo, played through YouTube's embedded player.