{"id":251,"date":"2023-08-03T14:52:03","date_gmt":"2023-08-03T14:52:03","guid":{"rendered":"https:\/\/statorials.org\/cn\/%e5%8c%ba%e9%97%b4%e4%bc%b0%e8%ae%a1\/"},"modified":"2023-08-03T14:52:03","modified_gmt":"2023-08-03T14:52:03","slug":"%e5%8c%ba%e9%97%b4%e4%bc%b0%e8%ae%a1","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/%e5%8c%ba%e9%97%b4%e4%bc%b0%e8%ae%a1\/","title":{"rendered":"\u4f30\u8ba1\u533a\u95f4"},"content":{"rendered":"<p>\u672c\u6587\u89e3\u91ca\u4e86\u7edf\u8ba1\u5b66\u4e2d\u7684\u533a\u95f4\u4f30\u8ba1\u3002\u60a8\u8fd8\u5c06\u4e86\u89e3\u5982\u4f55\u6267\u884c\u533a\u95f4\u4f30\u8ba1\uff0c\u4ee5\u53ca\u6700\u540e\uff0c\u533a\u95f4\u4f30\u8ba1\u4e0e\u70b9\u4f30\u8ba1\u6709\u4f55\u4e0d\u540c\u3002 <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%c2%bfque-es-la-estimacion-por-intervalos\"><\/span>\u4ec0\u4e48\u662f\u533a\u95f4\u4f30\u8ba1\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5728\u7edf\u8ba1\u5b66\u4e2d\uff0c<strong>\u533a\u95f4\u4f30\u8ba1<\/strong>\u662f\u4f7f\u7528\u533a\u95f4\u4f30\u8ba1\u603b\u4f53\u53c2\u6570\u503c\u7684\u8fc7\u7a0b\u3002\u66f4\u51c6\u786e\u5730\u8bf4\uff0c\u533a\u95f4\u4f30\u8ba1\u6d89\u53ca\u8ba1\u7b97\u6700\u6709\u53ef\u80fd\u4ee5\u4e00\u5b9a<a href=\"https:\/\/statorials.org\/cn\/\u4e00\u5b9a\u7a0b\u5ea6\u7684\u4fe1\u5fc3\/\">\u7f6e\u4fe1\u5ea6<\/a>\u627e\u5230\u53c2\u6570\u503c\u7684\u533a\u95f4\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u5728\u533a\u95f4\u4f30\u8ba1\u4e2d\uff0c\u6211\u4eec\u5f97\u51fa\u603b\u4f53\u5747\u503c\u7684\u7f6e\u4fe1\u533a\u95f4\u4e3a (3.7) \u4e14\u7f6e\u4fe1\u6c34\u5e73\u4e3a 95% \u7684\u7ed3\u8bba\uff0c\u8fd9\u610f\u5473\u7740\u6240\u7814\u7a76\u603b\u4f53\u7684\u5747\u503c\u5c06\u5728 3 \u5230 7 \u4e4b\u95f4\uff0c\u4e14\u7f6e\u4fe1\u6c34\u5e73\u4e3a\u6982\u7387\u4e3a95%\u3002<\/p>\n<p>\u4e00\u822c\u6765\u8bf4\uff0c\u4eba\u53e3\u89c4\u6a21\u592a\u5927\uff0c\u65e0\u6cd5\u7814\u7a76\u5176\u6240\u6709\u4e2a\u4f53\uff0c\u56e0\u6b64\u65e0\u6cd5\u786e\u5b9a\u5176\u7edf\u8ba1\u6d4b\u91cf\u503c\uff0c\u800c\u53ea\u662f\u4e00\u4e2a\u8fd1\u4f3c\u503c\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u533a\u95f4\u4f30\u8ba1\u7528\u4e8e\u6839\u636e\u6837\u672c\u6570\u636e\u63d0\u4f9b\u603b\u4f53\u53c2\u6570\u6240\u5728\u503c\u8303\u56f4\u7684\u8fd1\u4f3c\u503c\u3002\u8fd9\u6837\uff0c\u53ef\u4ee5\u6839\u636e\u6837\u672c\u7814\u7a76\u7684\u6570\u636e\u6765\u4f30\u8ba1\u603b\u4f53\u53c2\u6570\u7684\u503c\u3002<\/p>\n<p>\u6700\u540e\uff0c\u8981\u5145\u5206\u7406\u89e3\u533a\u95f4\u4f30\u8ba1\u7684\u542b\u4e49\uff0c\u9700\u8981\u660e\u786e\u7f6e\u4fe1\u533a\u95f4\u7684\u6982\u5ff5\u3002<strong>\u7f6e\u4fe1\u533a\u95f4<\/strong>\u662f\u63d0\u4f9b\u603b\u4f53\u53c2\u6570\u503c\u4e4b\u95f4\u7684\u8fd1\u4f3c\u503c\uff08\u5177\u6709\u4e00\u5b9a\u8bef\u5dee\u8303\u56f4\uff09\u7684\u533a\u95f4\u3002\u56e0\u6b64\uff0c\u7f6e\u4fe1\u533a\u95f4\u662f\u4ece\u533a\u95f4\u4f30\u8ba1\u5f97\u5230\u7684\u7ed3\u679c\u3002 <\/p>\n<div style=\"background-color:#FFFDE7; padding-top: 10px; padding-bottom: 10px; padding-right: 20px; padding-left: 30px; border: 2.5px dashed #FFB74D; border-radius:20px;\"> <span style=\"color:#ff951b\">\u27a4<\/span><strong>\u8bf7\u53c2\u9605\uff1a<\/strong><a href=\"https:\/\/statorials.org\/cn\/\u7f6e\u4fe1\u533a\u95f4\/\">\u4ec0\u4e48\u662f\u7f6e\u4fe1\u533a\u95f4\uff1f<\/a> <\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"formulas-de-la-estimacion-por-intervalos\"><\/span>\u533a\u95f4\u4f30\u8ba1\u516c\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u60a8\u5c06\u5728\u4e0b\u9762\u627e\u5230\u7528\u4e8e\u4f30\u8ba1\u7f6e\u4fe1\u533a\u95f4\u7684\u4e0d\u540c\u516c\u5f0f\uff0c\u56e0\u4e3a\u6839\u636e\u60a8\u662f\u5426\u5e0c\u671b\u4f30\u8ba1\u5e73\u5747\u503c\u3001\u65b9\u5dee\u6216\u6bd4\u4f8b\u7684\u7f6e\u4fe1\u533a\u95f4\uff0c\u8981\u4f7f\u7528\u7684\u516c\u5f0f\u662f\u4e0d\u540c\u7684\u3002 <\/p>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"intervalo-de-confianza-para-la-media\"><\/span>\u5e73\u5747\u503c\u7684\u7f6e\u4fe1\u533a\u95f4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5047\u8bbe\u8f93\u5165\u53d8\u91cf\u7684\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-f93a5e76c38b2e2556bd62ba66db5947_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"Z=\\cfrac{X-\\mu}{\\displaystyle\\frac{\\sigma}{\\sqrt{n}}} \\sim N(0,1)\" title=\"Rendered by QuickLaTeX.com\" height=\"60\" width=\"165\" style=\"vertical-align: -34px;\"><\/p>\n<\/p>\n<p>\u5e73\u5747\u503c\u7684\u7f6e\u4fe1\u533a\u95f4\u662f\u901a\u8fc7\u5728\u6837\u672c\u5e73\u5747\u503c\u4e2d\u52a0\u4e0a\u548c\u51cf\u53bb Z <sub>\u03b1\/2<\/sub>\u7684\u503c\u4e58\u4ee5\u6807\u51c6\u5dee (\u03c3) \u518d\u9664\u4ee5\u6837\u672c\u5927\u5c0f (n) \u7684\u5e73\u65b9\u6839\u6765\u8ba1\u7b97\u7684\u3002\u56e0\u6b64\uff0c\u5747\u503c\u7f6e\u4fe1\u533a\u95f4\u7684\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1a<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-985a374c69b468deb3d6d159fcbe6de5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\left(\\overline{x}-z_{\\alpha\/2}\\cdot \\frac{\\sigma}{\\sqrt{n}} \\ , \\ \\overline{x}+z_{\\alpha\/2}\\cdot \\frac{\\sigma}{\\sqrt{n}} \\right)\" title=\"Rendered by QuickLaTeX.com\" height=\"43\" width=\"251\" style=\"vertical-align: -17px;\"><\/p>\n<\/p>\n<p>\u5bf9\u4e8e\u5927\u6837\u672c\u91cf\u548c 95% \u7f6e\u4fe1\u6c34\u5e73\uff0c\u4e34\u754c\u503c\u4e3a Z <sub>\u03b1\/2<\/sub> = 1.96\uff1b\u5bf9\u4e8e 99% \u7f6e\u4fe1\u6c34\u5e73\uff0c\u4e34\u754c\u503c\u4e3a Z <sub>\u03b1\/2<\/sub> = 2.576\u3002<\/p>\n<p>\u5f53\u603b\u4f53\u65b9\u5dee\u5df2\u77e5\u65f6\uff0c\u4f7f\u7528\u4e0a\u8ff0\u516c\u5f0f\u3002\u4f46\u662f\uff0c\u5982\u679c\u603b\u4f53\u65b9\u5dee\u672a\u77e5\uff08\u8fd9\u662f\u6700\u5e38\u89c1\u7684\u60c5\u51b5\uff09\uff0c<strong>\u5219\u4f7f\u7528\u4ee5\u4e0b\u516c\u5f0f\u8ba1\u7b97\u5e73\u5747\u503c\u7684\u7f6e\u4fe1\u533a\u95f4\uff1a<\/strong><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-e40e2c40fbfe4f5aa96c21ff979aae5a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\left(\\overline{x}-t_{\\alpha\/2}\\cdot \\frac{s}{\\sqrt{n}} \\ , \\ \\overline{x}+t_{\\alpha\/2}\\cdot \\frac{s}{\\sqrt{n}} \\right)\" title=\"Rendered by QuickLaTeX.com\" height=\"43\" width=\"247\" style=\"vertical-align: -17px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\">\u91d1\u5b50\uff1a<\/p>\n<ul style=\"color:#FF8A05; font-weight: bold;\">\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-a39858a792fb4fe9a3173e004701f2a7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\overline{x}\" title=\"Rendered by QuickLaTeX.com\" height=\"11\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p>\u662f\u6837\u672c\u5747\u503c\u3002<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-33bd5d525ddf37600aef97b0c8c08f94_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"t_{\\alpha\/2}\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"29\" style=\"vertical-align: -8px;\"><\/p>\n<p>\u662f n-1 \u4e2a\u81ea\u7531\u5ea6\u7684 Student t \u5206\u5e03\u7684\u503c\uff0c\u6982\u7387\u4e3a \u03b1\/2\u3002<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-1edc883862ceed1a21913f60358e31d8_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"s\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"8\" style=\"vertical-align: 0px;\"><\/p>\n<p>\u662f\u6837\u672c\u6807\u51c6\u5dee\u3002<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-ec4217f4fa5fcd92a9edceba0e708cf7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"n\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p>\u662f\u6837\u672c\u5927\u5c0f\u3002 <\/li>\n<\/ul>\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/intervalle-de-confiance.png\" alt=\"\u7f6e\u4fe1\u533a\u95f4\" class=\"wp-image-5249\" width=\"351\" height=\"339\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<div style=\"background-color:#FFFDE7; padding-top: 10px; padding-bottom: 10px; padding-right: 20px; padding-left: 30px; border: 2.5px dashed #FFB74D; border-radius:20px;\"> <span style=\"color:#ff951b\">\u27a4<\/span><strong>\u8bf7\u53c2\u9605\uff1a<\/strong><a href=\"https:\/\/statorials.org\/cn\/\u5e73\u5747\u503c\u7684\u7f6e\u4fe1\u533a\u95f4\/\">\u8ba1\u7b97\u5e73\u5747\u503c\u7f6e\u4fe1\u533a\u95f4\u7684\u5b9e\u9645\u793a\u4f8b<\/a><\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"intervalo-de-confianza-para-la-varianza\"><\/span>\u65b9\u5dee\u7684\u7f6e\u4fe1\u533a\u95f4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4e3a\u4e86\u8ba1\u7b97\u603b\u4f53\u65b9\u5dee\u7684\u7f6e\u4fe1\u533a\u95f4\uff0c\u4f7f\u7528\u5361\u65b9\u5206\u5e03\u3002\u66f4\u5177\u4f53\u5730\u8bf4\uff0c<strong>\u8ba1\u7b97\u65b9\u5dee\u7f6e\u4fe1\u533a\u95f4\u7684\u516c\u5f0f<\/strong>\u4e3a\uff1a<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-c81b971afee9691573e8400dc0945c37_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\left( (n-1)\\frac{s^2}{\\chi_{n-1;\\alpha\/2}} \\ , \\ (n-1)\\frac{s^2}{\\chi_{n-1;1-\\alpha\/2}}\\right)\" title=\"Rendered by QuickLaTeX.com\" height=\"47\" width=\"304\" style=\"vertical-align: -20px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\">\u91d1\u5b50\uff1a<\/p>\n<ul style=\"color:#FF8A05; font-weight: bold;\">\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-ec4217f4fa5fcd92a9edceba0e708cf7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"n\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p>\u662f\u6837\u672c\u5927\u5c0f\u3002<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-1edc883862ceed1a21913f60358e31d8_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"s\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"8\" style=\"vertical-align: 0px;\"><\/p>\n<p>\u662f\u6837\u672c\u6807\u51c6\u5dee\u3002<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-a1f2f5b5bd065f40d0b8c175d6d48950_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\chi_{n-1;\\alpha\/2}\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"64\" style=\"vertical-align: -8px;\"><\/p>\n<p>\u662f\u5177\u6709 n-1 \u4e2a\u81ea\u7531\u5ea6\u4e14\u6982\u7387\u5c0f\u4e8e \u03b1\/2 \u7684\u5361\u65b9\u5206\u5e03\u7684\u503c\u3002<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-f1726e9973441084f7ac98c5550f1b23_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\chi_{n-1;1-\\alpha\/2}\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"82\" style=\"vertical-align: -8px;\"><\/p>\n<p>\u662f\u5177\u6709 n-1 \u4e2a\u81ea\u7531\u5ea6\u3001\u6982\u7387\u5927\u4e8e 1-\u03b1\/2 \u7684\u5361\u65b9\u5206\u5e03\u7684\u503c\u3002 <\/li>\n<\/ul>\n<div style=\"background-color:#FFFDE7; padding-top: 10px; padding-bottom: 10px; padding-right: 20px; padding-left: 30px; border: 2.5px dashed #FFB74D; border-radius:20px;\"> <span style=\"color:#ff951b\">\u27a4<\/span><strong>\u8bf7\u53c2\u9605\uff1a<\/strong><a href=\"https:\/\/statorials.org\/cn\/\u65b9\u5dee\u7684\u7f6e\u4fe1\u533a\u95f4\/\">\u8ba1\u7b97\u65b9\u5dee\u7f6e\u4fe1\u533a\u95f4\u7684\u5b9e\u9645\u793a\u4f8b<\/a><\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"intervalo-de-confianza-para-la-proporcion\"><\/span>\u6bd4\u4f8b\u7684\u7f6e\u4fe1\u533a\u95f4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6bd4\u4f8b\u7684\u7f6e\u4fe1\u533a\u95f4\u662f\u901a\u8fc7\u4ece\u6837\u672c\u6bd4\u4f8b\u4e2d\u6dfb\u52a0\u548c\u51cf\u53bb Z <sub>\u03b1\/2<\/sub>\u7684\u503c\u4e58\u4ee5\u6837\u672c\u6bd4\u4f8b\u7684\u5e73\u65b9\u6839 (p) \u4e58\u4ee5 1-p \u518d\u9664\u4ee5\u6837\u672c\u5927\u5c0f (n) \u6765\u8ba1\u7b97\u7684\u3002\u56e0\u6b64\uff0c<strong>\u8ba1\u7b97\u6bd4\u4f8b\u7f6e\u4fe1\u533a\u95f4\u7684\u516c\u5f0f<\/strong>\u4e3a\uff1a<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-a328986eaa330c075c7fb85780df6411_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\left(p-Z_{\\alpha\/2}\\sqrt{\\frac{p(1-p)}{n}}\\ , \\ p+Z_{\\alpha\/2}\\sqrt{\\frac{p(1-p)}{n}}\\right) \" title=\"Rendered by QuickLaTeX.com\" height=\"54\" width=\"339\" style=\"vertical-align: -23px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\">\u91d1\u5b50\uff1a <\/p>\n<ul style=\"color:#FF8A05; font-weight: bold;\">\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-5faad0904f612a3fa5b27faafb8dc903_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"p\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"10\" style=\"vertical-align: -4px;\"><\/p>\n<p>\u662f\u6837\u672c\u6bd4\u4f8b\u3002<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-ec4217f4fa5fcd92a9edceba0e708cf7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"n\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p>\u662f\u6837\u672c\u5927\u5c0f\u3002<\/li>\n<li style=\"margin-bottom:7px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-6f8ee37ecf97c2a7c7d6dbe8fddddc27_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"Z_{\\alpha\/2}\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"34\" 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id=\"estimacion-por-intervalos-y-estimacion-puntual\"><\/span>\u533a\u95f4\u4f30\u8ba1\u548c\u70b9\u4f30\u8ba1<span 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