概率统计与数学模型练习册-畅读网

　　　　

概率统计与数学模型练习册

作者：马祥玉

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mobi/epub/pdf/awz3

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内容简介:

本书为《概率统计与数学模型》的配套练习册。内容包括概率论和数理统计两大部分，共7章。第1至4章对应教材的概率论部分，包括随机事件与概率、随机变量及其分布、多维随机变量及其分布、大数定律等。第5至7章对应教材的数理统计部分，包括样本及抽样分布、参数估计、假设检验等。每章包含知识点梳理、典型题型练习、能力提升、综合练习和考研试题精选5个部分。本书可作为高等院校理工类、经管类专业概率论与数理统计课程的教辅资料。

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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 5 LIMIT 1 [ RunTime:0.007880s ]
SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 46 LIMIT 1 [ RunTime:0.013934s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 11 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.001959s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 14 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.014942s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1747276717 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:1.171084s ]

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