6.1.2数据的收集与整理.ppt

觉得自己做得到和做不到, 其实只在一念之间….. Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 一天,爸爸叫儿子小华去买一盒火柴。临出门前,爸爸嘱咐儿子要买能划燃的火柴。小华拿着钱出门了,过了好一会儿, 小华才回到家。“火柴能划燃吗? ”爸爸问。“都能划燃。”“你这么肯定? ”小华递过一盒划过的火柴,兴奋地说: “我每根都试过啦。”思考: 得到火柴能否划燃的信息准确吗? 这样做有什么后果? Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 你知道其中蕴涵的道理吗? 品尝一勺汤如何知道一锅汤的味道? 根据这个道理,小华买火柴时怎么做才合理? Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 一确定目标合作探究 1、什么是抽样调查?为什么要进行抽样调查? 2、什么是总体、个体?什么是样本、样本容量? 3、什么是简单随机抽样?抽样调查的特点? Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 二★所要考察的对象的全体称为总体★组成总体的每一个考察对象称为个体★从总体中抽取的一部分个体叫做总体的一个样本。★样本中个体的数目叫做样本的容量。总体:个体:样本:样本的容量: :通过品尝一勺汤知道一锅汤的味道。抽样调查: Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 象这种根据三根火柴的划燃情况来估计一盒火柴的划燃情况的调查方法叫抽样调查;其中一盒火柴的划燃情况是我们要考察的全体对象叫总体,而其中从一盒火柴中抽取的三根火柴的划燃情况叫样本,总体中每根火柴的划燃情况叫个体,样本的个数叫做样本容量(没有单位) . Evaluation only. Evaluation only. Crea