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1、第七章第七章 抽样调查抽样调查 XPQ2 xp q2ss nNm重nNCm不重计算样本统计计算样本统计量量如：样本均值如：样本均值 、成数、方差、成数、方差,21nxxxX211lim1Xxnpniin1limpnmpnX xxxxax 0 xax125 . 0X2xXpPx 1limXxpn1limPppn整群简单等距分层MXxx2MPpp2nx212NnNnx2xnNnPPp)1 ( 1)1 (NnNnPPpPp)1 (PPnN重不重211NnN1121NnNNnN或NnNnN11)(Nn11Nnnx2 元86. 81408 .1042nsx元63. 8280014011408 .1041
2、22NnnsxXxxPppxxXxXppPpPppppxxxxzzzz或或XxxPppxxXxXppPpPxxxXxpppPp 1xXpP xXpPxxxXxpppPp1 1)(1)(zFzPpPzFzXxPpxxxx22s1,12222ffxxsnxxsnsnx或NnnsNnnx1122或xxzxxxXx35x5 . 4s件4269. 0100010011005 . 411222NnnsNnNnx9545. 01）（2z（件）8538. 04269. 02xxz85.3515.348538.0358538.035XXxXxxx件12610012600fxfx件86.41994144122ff
3、xxs件614. 01000100110086.4112Nnnsx95. 01 ）（96. 1z 件203. 1614. 096. 1xxz203.127797.124203.1126203.1126XX1272031247971000203.11261000203.1126NXNXNxNXNxxx645x2 . 7x2 .6528 .6372 .76452 .7645XX4 .13046 .1275200002 .652200008 .637NXNX6 .72s公斤6 . 32000040014006 .72122Nnnsx26 . 32 . 7xxz 9545. 02 F），（XNX230
4、nx1nt）（1ntXxtx（克）1 .79110806810780789nxx 克136.171109 .264212nxxsi 克419. 510136.17nsnx95. 01 ）（2622. 2)9(1025. 02tnt 克）（26.12419. 52622. 292xxt84.77836.80326.121 .79126.121 .791XX2p2snnp111nppp111NnNnpppppzpppPpNpPNNppp%4100)80. 01 (80. 0)1 (nPPp9 . 01 ）（645. 1z%58. 6%4645. 1ppz%58.86%42.73%58.6%80%5
5、8.6%80PPpPppp1090100100001nnnN9 . 0100901nnp028. 0100010011001 . 09 . 0111Nnnppp95. 01 ）（96. 1z0548. 0028. 096. 1ppz9548.08452.00548.09 .00548.09 .0PP8 .9542 .84510000548.09 .010000548.09 .0PNPNxnz222xzn重复xNnNnz12222221zNNznx不重 NnnzNNznx重复重复不重122222252510000zNx 袋1005252222222xzn 袋10001.9925251000025
6、2100002222222222zNNznx22)1 (pPPzn重复)1 () 1()1 (222PPzNNPPznp不重复NnnPPzNNPPznp重复重复不重复1)1 ()1 (222 39 . 045. 5%9885.652zpxx个）（6162.609 . 0456. 5322222xxzn)(719 . 098. 0198. 03)1 (2222个）（ppppzn 2%3%935000zpNp件重复2903 .28903. 007. 093. 0212222pppzn件重复重复不重2745000289.313 .2891Nnnn%93pnnxxiiixinnnppiiipnx2Nn
7、nx122nnii22nnssii22nPPp1NnnPPx11nnppppPPiii111PP 1组间方差组内方差平均数总方差222x。 PzFppnn求已知%45.95%20%707006002121%4213007002 . 06007 . 0nnppii18. 013007008 . 02 . 06003 . 07 . 011nnppppiii%1 . 1130018. 01nPPp%2 . 2%1 . 12ppz%2 .44%8 .39PpPppp222xzn重复222221zNNznx不重221pPPzn重复PPzNNPPznp111222不重rxxrii1ixrrpprii1ipRrrRrRrx11222rxxriix122rppriip122R PXpxzFrRii和求已知%95127208.201rxxrii5378. 0122rxxriix195. 012RrRrxx3822. 0195. 096. 1xxz46.2069.19XxXxxx9033. 01rpprii00089. 0122rppriip0079. 012RrRrpx0158. 00079. 096. 1xxz%91.91%75.88PpPppp