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Think Stats 2, 3장 연습문제
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{ | |
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"통계적 사고 (2판) 연습문제 ([thinkstats2.com](thinkstats2.com), [think-stat.xwmooc.org](http://think-stat.xwmooc.org))<br>\n", | |
"Allen Downey / 이광춘(xwMOOC)\n", | |
"\n", | |
"여성 응답자 파일을 읽어들인다." | |
] | |
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{ | |
"cell_type": "code", | |
"execution_count": 1, | |
"metadata": { | |
"collapsed": false | |
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"%matplotlib inline\n", | |
"\n", | |
"import chap01soln\n", | |
"resp = chap01soln.ReadFemResp()" | |
] | |
}, | |
{ | |
"cell_type": "markdown", | |
"metadata": {}, | |
"source": [ | |
"응답자 가구에서 18세 이하 자녀수, <tt>numkdhh</tt>에 대한 PMF를 생성하라." | |
] | |
}, | |
{ | |
"cell_type": "code", | |
"execution_count": 1, | |
"metadata": { | |
"collapsed": false | |
}, | |
"outputs": [], | |
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}, | |
{ | |
"cell_type": "markdown", | |
"metadata": {}, | |
"source": [ | |
"PMF를 화면에 표시하라." | |
] | |
}, | |
{ | |
"cell_type": "code", | |
"execution_count": 1, | |
"metadata": { | |
"collapsed": false | |
}, | |
"outputs": [], | |
"source": [] | |
}, | |
{ | |
"cell_type": "markdown", | |
"metadata": {}, | |
"source": [ | |
"<tt>BiasPmf</tt>를 정의하시오." | |
] | |
}, | |
{ | |
"cell_type": "code", | |
"execution_count": 2, | |
"metadata": { | |
"collapsed": false | |
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"def BiasPmf(pmf, label=''):\n", | |
" \"\"\"Returns the Pmf with oversampling proportional to value.\n", | |
"\n", | |
" If pmf is the distribution of true values, the result is the\n", | |
" distribution that would be seen if values are oversampled in\n", | |
" proportion to their values; for example, if you ask students\n", | |
" how big their classes are, large classes are oversampled in\n", | |
" proportion to their size.\n", | |
"\n", | |
" Args:\n", | |
" pmf: Pmf object.\n", | |
" label: string label for the new Pmf.\n", | |
"\n", | |
" Returns:\n", | |
" Pmf object\n", | |
" \"\"\"\n", | |
" new_pmf = pmf.Copy(label=label)\n", | |
"\n", | |
" for x, p in pmf.Items():\n", | |
" new_pmf.Mult(x, x)\n", | |
" \n", | |
" new_pmf.Normalize()\n", | |
" return new_pmf" | |
] | |
}, | |
{ | |
"cell_type": "markdown", | |
"metadata": {}, | |
"source": [ | |
"응답자 대신에 자녀를 설문조사하면 관측되듯이, 가구 자녀수에 대한 편향된 Pmf를 생성하시오." | |
] | |
}, | |
{ | |
"cell_type": "code", | |
"execution_count": 2, | |
"metadata": { | |
"collapsed": false | |
}, | |
"outputs": [], | |
"source": [] | |
}, | |
{ | |
"cell_type": "markdown", | |
"metadata": {}, | |
"source": [ | |
"실제 Pmf와 편향된 Pmf를 동일축으로 화면에 표시하시오." | |
] | |
}, | |
{ | |
"cell_type": "code", | |
"execution_count": 2, | |
"metadata": { | |
"collapsed": false | |
}, | |
"outputs": [], | |
"source": [] | |
}, | |
{ | |
"cell_type": "markdown", | |
"metadata": {}, | |
"source": [ | |
"두 Pmf의 평균을 계산하시오." | |
] | |
}, | |
{ | |
"cell_type": "code", | |
"execution_count": 2, | |
"metadata": { | |
"collapsed": false | |
}, | |
"outputs": [], | |
"source": [] | |
} | |
], | |
"metadata": { | |
"kernelspec": { | |
"display_name": "Python 2", | |
"language": "python", | |
"name": "python2" | |
}, | |
"language_info": { | |
"codemirror_mode": { | |
"name": "ipython", | |
"version": 2 | |
}, | |
"file_extension": ".py", | |
"mimetype": "text/x-python", | |
"name": "python", | |
"nbconvert_exporter": "python", | |
"pygments_lexer": "ipython2", | |
"version": "2.7.10" | |
} | |
}, | |
"nbformat": 4, | |
"nbformat_minor": 0 | |
} |
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