{"id":21775,"date":"2023-12-06T02:54:46","date_gmt":"2023-12-06T02:54:46","guid":{"rendered":"https:\/\/masterskills.org\/blog\/variance-la-gi-cong-thuc-tinh-variance-va-ung-dung.html"},"modified":"2023-12-12T04:44:00","modified_gmt":"2023-12-12T04:44:00","slug":"variance-la-gi-cong-thuc-tinh-variance-va-ung-dung","status":"publish","type":"post","link":"https:\/\/masterskills.org\/blog\/variance-la-gi-cong-thuc-tinh-variance-va-ung-dung.html","title":{"rendered":"Variance l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c t\u00ednh variance v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"<div class=\"entry-content\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/masterskills.org\/blog\/wp-content\/uploads\/\/12\/3ce07f40f84dd416493c173dfe02741a-1.jpg\" title=\"3ce07f40f84dd416493c173dfe02741a-1\"><\/figure>\n<p>Variance l\u00e0 g\u00ec, c\u00f3 g\u00ec kh\u00e1c bi\u1ec7t so v\u1edbi \u0111\u1ed9 l\u1ec7ch chu\u1ea9n v\u00e0 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c n\u00e0o? H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u sau \u0111\u00e2y nh\u00e9.<\/p>\n<h2><span id=\"Variance_la_gi\"><strong>Variance l\u00e0 g\u00ec?<\/strong><\/span><\/h2>\n<p>Variance hay ph\u01b0\u01a1ng sai l\u00e0 th\u01b0\u1edbc \u0111o s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa k\u1ebft qu\u1ea3 th\u1ef1c t\u1ebf v\u00e0 k\u1ebft qu\u1ea3 k\u1ef3 v\u1ecdng. Trong k\u1ebf to\u00e1n qu\u1ea3n tr\u1ecb v\u00e0 l\u1eadp ng\u00e2n s\u00e1ch c\u00e1 nh\u00e2n, n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem m\u1ed9t c\u00e1 nh\u00e2n ho\u1eb7c doanh nghi\u1ec7p \u0111\u00e3 v\u01b0\u1ee3t qu\u00e1 hay thi\u1ebfu h\u1ee5t so v\u1edbi thu nh\u1eadp v\u00e0 chi ph\u00ed theo ng\u00e2n s\u00e1ch c\u1ee7a m\u00ecnh.<\/p>\n<p>Trong th\u1ed1ng k\u00ea, y\u1ebfu t\u1ed1 n\u00e0y \u0111\u1ea1i di\u1ec7n cho s\u1ef1 lan truy\u1ec1n c\u1ee7a m\u1ed9t t\u1eadp h\u1ee3p s\u1ed1 v\u00e0 \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng \u0111\u1ed9 l\u1ec7ch b\u00ecnh ph\u01b0\u01a1ng trung b\u00ecnh so v\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh.<\/p>\n<p>Variance c\u00f2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u trong \u0111\u1ea7u t\u01b0 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh hi\u1ec7u su\u1ea5t ri\u00eang l\u1ebb c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c ph\u1ea7n trong danh m\u1ee5c \u0111\u1ea7u t\u01b0. \u0110i\u1ec1u n\u00e0y gi\u00fap c\u00e1c nh\u00e0 qu\u1ea3n l\u00fd t\u00e0i s\u1ea3n v\u00e0 c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t \u0111\u1ea7u t\u01b0 c\u1ee7a h\u1ecd. Tuy nhi\u00ean, n\u00f3 kh\u00f4ng gi\u1edbi h\u1ea1n \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0.<\/p>\n<p>C\u00e1c chuy\u00ean gia kh\u00e1c c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng sai l\u00e0 nh\u00e0 khoa h\u1ecdc, nh\u00e0 th\u1ed1ng k\u00ea, nh\u00e0 to\u00e1n h\u1ecdc, nh\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u v\u00e0 b\u1ea5t k\u1ef3 ai ch\u1ecbu tr\u00e1ch nhi\u1ec7m x\u00e1c \u0111\u1ecbnh r\u1ee7i ro.<\/p>\n<p>Variance cho b\u1ea1n bi\u1ebft m\u1ee9c \u0111\u1ed9 ch\u00eanh l\u1ec7ch trong t\u1eadp d\u1eef li\u1ec7u.\u00a0D\u1eef li\u1ec7u c\u00e0ng l\u1edbn, ph\u01b0\u01a1ng sai so v\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh c\u00e0ng l\u1edbn.<\/p>\n<h2><span id=\"Su_khac_biet_cua_do_lech_chuan_va_phuong_sai_variance_la_gi\"><strong>S\u1ef1 kh\u00e1c bi\u1ec7t c\u1ee7a \u0111\u1ed9 l\u1ec7ch chu\u1ea9n v\u00e0 ph\u01b0\u01a1ng sai variance l\u00e0 g\u00ec?<\/strong><\/span><\/h2>\n<p>\u0110\u1ed9 l\u1ec7ch chu\u1ea9n (standard deviation) \u0111\u01b0\u1ee3c t\u00ednh t\u1eeb ph\u01b0\u01a1ng sai v\u00e0 cho b\u1ea1n bi\u1ebft trung b\u00ecnh m\u1ed7i gi\u00e1 tr\u1ecb n\u1eb1m bao xa so v\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh. \u0110\u00f3 l\u00e0 c\u0103n b\u1eadc hai c\u1ee7a variance.<\/p>\n<p>C\u1ea3 hai th\u01b0\u1edbc \u0111o \u0111\u1ec1u ph\u1ea3n \u00e1nh s\u1ef1 thay \u0111\u1ed5i trong ph\u00e2n b\u1ed5, nh\u01b0ng \u0111\u01a1n v\u1ecb c\u1ee7a ch\u00fang kh\u00e1c nhau:<\/p>\n<p>\u2013 \u0110\u1ed9 l\u1ec7ch chu\u1ea9n \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng c\u00e1c \u0111\u01a1n v\u1ecb gi\u1ed1ng nh\u01b0 c\u00e1c gi\u00e1 tr\u1ecb ban \u0111\u1ea7u (v\u00ed d\u1ee5: m\u00e9t).<\/p>\n<p>\u2013 Ph\u01b0\u01a1ng sai \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng c\u00e1c \u0111\u01a1n v\u1ecb l\u1edbn h\u01a1n nhi\u1ec1u (v\u00ed d\u1ee5: m\u00e9t b\u00ecnh ph\u01b0\u01a1ng)<\/p>\n<p>V\u00ec c\u00e1c \u0111\u01a1n v\u1ecb c\u1ee7a ph\u01b0\u01a1ng sai l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi c\u00e1c \u0111\u01a1n v\u1ecb c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb c\u1ee7a t\u1eadp d\u1eef li\u1ec7u, n\u00ean vi\u1ec7c gi\u1ea3i th\u00edch s\u1ed1 ph\u01b0\u01a1ng sai m\u1ed9t c\u00e1ch tr\u1ef1c quan s\u1ebd kh\u00f3 h\u01a1n. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao \u0111\u1ed9 l\u1ec7ch chu\u1ea9n th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u01b0a th\u00edch nh\u01b0 m\u1ed9t th\u01b0\u1edbc \u0111o ch\u00ednh c\u1ee7a s\u1ef1 thay \u0111\u1ed5i.<\/p>\n<p>Tuy nhi\u00ean, variance mang nhi\u1ec1u th\u00f4ng tin h\u01a1n v\u1ec1 s\u1ef1 thay \u0111\u1ed5i so v\u1edbi \u0111\u1ed9 l\u1ec7ch chu\u1ea9n v\u00e0 n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u01b0a ra c\u00e1c suy lu\u1eadn th\u1ed1ng k\u00ea.<\/p>\n<h3><span id=\"Cac_loai_phuong_sai\"><strong>C\u00e1c lo\u1ea1i ph\u01b0\u01a1ng sai<\/strong><\/span><\/h3>\n<p>Ph\u01b0\u01a1ng sai thu nh\u1eadp: \u0110\u00e2y l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa thu nh\u1eadp th\u1ef1c t\u1ebf v\u00e0 thu nh\u1eadp k\u1ef3 v\u1ecdng. N\u1ebfu con s\u1ed1 th\u1ef1c t\u1ebf cao h\u01a1n b\u1ea1n mong \u0111\u1ee3i, ph\u01b0\u01a1ng sai \u0111\u01b0\u1ee3c cho l\u00e0 c\u00f3 l\u1ee3i. N\u1ebfu n\u00f3 th\u1ea5p h\u01a1n con s\u1ed1 d\u1ef1 ki\u1ebfn, b\u1ea1n c\u00f3 m\u1ed9t ph\u01b0\u01a1ng sai b\u1ea5t l\u1ee3i trong thu nh\u1eadp.<\/p>\n<p>Ph\u01b0\u01a1ng sai chi ph\u00ed: \u0110i\u1ec1u n\u00e0y th\u1ec3 hi\u1ec7n s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa chi ph\u00ed th\u1ef1c t\u1ebf v\u00e0 chi ph\u00ed \u0111\u01b0\u1ee3c l\u1eadp ng\u00e2n s\u00e1ch. N\u1ebfu b\u1ea1n chi ti\u00eau \u00edt h\u01a1n ng\u00e2n s\u00e1ch d\u1ef1 tr\u00f9, s\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u01b0\u1ee3c cho l\u00e0 m\u1ed9t ph\u01b0\u01a1ng sai c\u00f3 l\u1ee3i; n\u1ebfu b\u1ea1n \u0111\u00e3 chi ti\u00eau nhi\u1ec1u h\u01a1n d\u1ef1 to\u00e1n, b\u1ea1n c\u00f3 m\u1ed9t ph\u01b0\u01a1ng sai b\u1ea5t l\u1ee3i.<\/p>\n<p>B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 t\u00ednh ph\u01b0\u01a1ng sai cho m\u1ed9t lo\u1ea1i chi ph\u00ed c\u1ee5 th\u1ec3 (v\u00ed d\u1ee5: chi ph\u00ed v\u1eadn chuy\u1ec3n v\u00e0 th\u1ef1c ph\u1ea9m d\u1ef1 ki\u1ebfn \u200b\u200bv\u00e0 th\u1ef1c t\u1ebf c\u1ee7a b\u1ea1n). C\u00e1c doanh nghi\u1ec7p th\u01b0\u1eddng theo d\u00f5i ph\u01b0\u01a1ng sai c\u1ee7a c\u00e1c lo\u1ea1i chi ph\u00ed kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 chi ph\u00ed nguy\u00ean v\u1eadt li\u1ec7u tr\u1ef1c ti\u1ebfp ho\u1eb7c chi ph\u00ed lao \u0111\u1ed9ng v\u00e0 chi ph\u00ed chung.<\/p>\n<p>Ph\u01b0\u01a1ng sai th\u1eb7ng d\u01b0 \/ th\u00e2m h\u1ee5t ho\u1eb7c l\u00e3i \/ l\u1ed7: M\u1ed9t c\u00e1 nh\u00e2n c\u0169ng c\u00f3 th\u1ec3 ch\u1ecdn t\u00ednh ph\u01b0\u01a1ng sai gi\u1eefa th\u1eb7ng d\u01b0 th\u1ef1c t\u1ebf v\u00e0 th\u1eb7ng d\u01b0 d\u1ef1 ki\u1ebfn, ho\u1eb7c ph\u01b0\u01a1ng sai gi\u1eefa th\u00e2m h\u1ee5t th\u1ef1c t\u1ebf ho\u1eb7c d\u1ef1 ki\u1ebfn. T\u01b0\u01a1ng t\u1ef1, m\u1ed9t doanh nghi\u1ec7p c\u00f3 th\u1ec3 ch\u1ecdn \u0111\u1ec3 \u0111o l\u01b0\u1eddng ph\u01b0\u01a1ng sai gi\u1eefa l\u00e3i ho\u1eb7c l\u1ed7 th\u1ef1c t\u1ebf v\u00e0 d\u1ef1 ki\u1ebfn.<\/p>\n<h3><span id=\"Cong_thuc_tinh_variance\"><strong>C\u00f4ng th\u1ee9c t\u00ednh variance<\/strong><\/span><\/h3>\n<p>Hi\u1ec3u variance l\u00e0 g\u00ec, th\u00ec b\u1ea1n kh\u00f4ng th\u1ec3 b\u1ecf qua c\u00e1ch t\u00ednh. \u0110\u1ec3 t\u00ednh to\u00e1n ph\u01b0\u01a1ng sai, b\u1ea1n c\u1ea7n b\u00ecnh ph\u01b0\u01a1ng m\u1ed7i \u0111\u1ed9 l\u1ec7ch c\u1ee7a m\u1ed9t bi\u1ebfn nh\u1ea5t \u0111\u1ecbnh (x) v\u00e0 gi\u00e1 tr\u1ecb trung b\u00ecnh.<\/p>\n<p>Trong m\u1ed9t t\u1eadp d\u1eef li\u1ec7u, b\u1ea1n s\u1ebd tr\u1eeb t\u1eebng gi\u00e1 tr\u1ecb kh\u1ecfi gi\u00e1 tr\u1ecb trung b\u00ecnh ri\u00eang l\u1ebb, sau \u0111\u00f3 b\u00ecnh ph\u01b0\u01a1ng gi\u00e1 tr\u1ecb, (\u03bc \u2013 X) \u00b2. Sau \u0111\u00f3, b\u1ea1n s\u1ebd c\u1ed9ng t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ed9 l\u1ec7ch b\u00ecnh ph\u01b0\u01a1ng l\u1ea1i v\u1edbi nhau v\u00e0 chia ch\u00fang cho t\u1ed5ng s\u1ed1 gi\u00e1 tr\u1ecb \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee9c trung b\u00ecnh. Con s\u1ed1 n\u00e0y l\u00e0 ph\u01b0\u01a1ng sai.<\/p>\n<p><strong>\u0110\u1ec3 t\u00ecm \u0111\u1ed9 l\u1ec7ch chu\u1ea9n, b\u1ea1n ch\u1ec9 c\u1ea7n l\u1ea5y c\u0103n b\u1eadc hai c\u1ee7a ph\u01b0\u01a1ng sai.<\/strong><\/p>\n<p>C\u00f4ng th\u1ee9c nh\u01b0 sau:<\/p>\n<p>Var (X) = E (x \u2013 \u03bc) \u00b2 \/ N<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<p>x la\u0300 gia\u0301 tri\u0323 trong t\u1eadp d\u1eef li\u1ec7u<\/p>\n<p>\u00b5 la\u0300 gia\u0301 tri\u0323 trung bi\u0300nh cu\u0309a t\u00e2\u0323p d\u01b0\u0303 li\u00ea\u0323u<\/p>\n<p>n la\u0300 s\u00f4\u0301 l\u01b0\u1ee3ng gi\u00e1 tr\u1ecb trong t\u1eadp d\u1eef li\u1ec7u<\/p>\n<p><strong>V\u00ed d\u1ee5 v\u1ec1 c\u00e1ch t\u00ednh ph\u01b0\u01a1ng sai<\/strong><\/p>\n<p>Gi\u1ea3 s\u1eed l\u1ee3i nhu\u1eadn c\u1ed5 phi\u1ebfu c\u1ee7a b\u1ea1n l\u00e0 10% trong kho\u1ea3n \u0111\u1ea7u t\u01b0 n\u0103m \u0111\u1ea7u ti\u00ean, 20% trong n\u0103m th\u1ee9 hai v\u00e0 15% trong n\u0103m th\u1ee9 ba. L\u1ee3i nhu\u1eadn trung b\u00ecnh l\u00e0 15%.<\/p>\n<p><strong>B\u00e2y gi\u1edd, h\u00e3y t\u00ednh m\u1ee9c ch\u00eanh l\u1ec7ch l\u1ee3i nhu\u1eadn v\u00e0 l\u1ee3i t\u1ee9c trung b\u00ecnh<\/strong><\/p>\n<p>N\u0103m th\u1ee9 nh\u1ea5t: L\u1ee3i nhu\u1eadn = 10% \u2013 15% = -5%; L\u1ee3i t\u1ee9c trung b\u00ecnh = -5% \u00b2 = 25%<\/p>\n<p>N\u0103m th\u1ee9 hai: L\u1ee3i nhu\u1eadn = 20% \u2013 15% = 5%; L\u1ee3i t\u1ee9c trung b\u00ecnh 5% \u00b2 = 25%<\/p>\n<p>N\u0103m th\u1ee9 ba: L\u1ee3i nhu\u1eadn = 15% \u2013 15% = 0%; L\u1ee3i t\u1ee9c trung b\u00ecnh 0% \u00b2 = 0<\/p>\n<p>B\u00e2y gi\u1edd, ch\u00fang ta ph\u1ea3i c\u1ed9ng ba n\u0103m v\u00e0 chia \u0111\u1ec3 t\u00ecm gi\u00e1 tr\u1ecb trung b\u00ecnh:<\/p>\n<p>(25% + 25% + 0%)\/3 = 16,667%<\/p>\n<p>Theo v\u00ed d\u1ee5 n\u00e0y, ph\u01b0\u01a1ng sai c\u1ee7a l\u1ee3i nhu\u1eadn c\u1ed5 phi\u1ebfu g\u1ea7n nh\u01b0 l\u00e0 17%.<\/p>\n<h3><span id=\"Uu_va_nhuoc_diem_cua_viec_su_dung_variance\"><strong>\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng variance<\/strong><\/span><\/h3>\n<p>\u01afu \u0111i\u1ec3m l\u1edbn nh\u1ea5t c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng ph\u01b0\u01a1ng sai l\u00e0 thu \u0111\u01b0\u1ee3c th\u00f4ng tin v\u1ec1 m\u1ed9t t\u1eadp h\u1ee3p d\u1eef li\u1ec7u. Cho d\u00f9 b\u1ea1n l\u00e0 m\u1ed9t nh\u00e0 \u0111\u1ea7u t\u01b0 \u0111ang t\u00ecm c\u00e1ch gi\u1ea3m thi\u1ec3u r\u1ee7i ro hay m\u1ed9t nh\u00e0 th\u1ed1ng k\u00ea c\u1ea7n hi\u1ec3u m\u1ee9c ch\u00eanh l\u1ec7ch c\u1ee7a m\u1ed9t m\u1eabu, th\u00ec ph\u01b0\u01a1ng sai l\u00e0 th\u00f4ng tin m\u00e0 m\u1ecdi ng\u01b0\u1eddi c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 r\u00fat ra c\u00e1c suy lu\u1eadn nhanh ch\u00f3ng. S\u1eed d\u1ee5ng ch\u00fang s\u1ebd nhanh h\u01a1n l\u00e0 v\u1ebd t\u1eebng con s\u1ed1 tr\u00ean m\u1ed9t m\u1ee9c ch\u00eanh l\u1ec7ch v\u00e0 x\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch g\u1ea7n \u0111\u00fang t\u1eeb gi\u00e1 tr\u1ecb trung b\u00ecnh v\u00e0 m\u1ed7i bi\u1ebfn.<\/p>\n<p>Ph\u01b0\u01a1ng sai coi t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 trong m\u1ed9t t\u1eadp h\u1ee3p nh\u01b0 nhau, b\u1ea5t k\u1ec3 ch\u00fang l\u00e0 s\u1ed1 d\u01b0\u01a1ng hay s\u1ed1 \u00e2m, \u0111\u00f3 l\u00e0 m\u1ed9t l\u1ee3i th\u1ebf kh\u00e1c khi s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c n\u00e0y.<\/p>\n<p>M\u1ed9t b\u1ea5t l\u1ee3i c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng variance l\u00e0 c\u00e1c gi\u00e1 tr\u1ecb ngo\u1ea1i l\u1ec7 l\u1edbn h\u01a1n trong t\u1eadp h\u1ee3p c\u00f3 th\u1ec3 g\u00e2y ra m\u1ed9t s\u1ed1 sai l\u1ec7ch v\u1ec1 d\u1eef li\u1ec7u, v\u00ec v\u1eady n\u00f3 kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i l\u00e0 m\u1ed9t ph\u00e9p t\u00ednh cung c\u1ea5p \u0111\u1ed9 ch\u00ednh x\u00e1c ho\u00e0n h\u1ea3o.<\/p>\n<p>Hi v\u1ecdng v\u1edbi c\u00e1ch gi\u1ea3i th\u00edch variance l\u00e0 g\u00ec theo c\u00e1ch d\u1ec5 hi\u1ec3u nh\u1ea5t c\u0169ng nh\u01b0 v\u00ed d\u1ee5 minh h\u1ecda r\u00f5 r\u00e0ng, b\u1ea1n s\u1ebd hi\u1ec3u h\u01a1n v\u1ec1 kh\u00e1i ni\u1ec7m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i n\u00e0y.<strong>\u00a0<\/strong><\/p>\n<p style=\"text-align: right\"><strong>Hu\u1ef3nh Tr\u00e2m<\/strong><\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Variance l\u00e0 g\u00ec, c\u00f3 g\u00ec kh\u00e1c bi\u1ec7t so v\u1edbi \u0111\u1ed9 l\u1ec7ch chu\u1ea9n v\u00e0 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c n\u00e0o? H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u sau \u0111\u00e2y nh\u00e9.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[429],"tags":[],"_links":{"self":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/21775"}],"collection":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/comments?post=21775"}],"version-history":[{"count":0,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/21775\/revisions"}],"wp:attachment":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/media?parent=21775"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/categories?post=21775"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/tags?post=21775"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}