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d.innerHTML = d.innerHTML + '<a class=\"download_word download_word_lb\" href=\"javascript:;\" id=\"vipdown\" onclick=\"showpay(2)\"><div class=\"download_card\"><div class=\"card_nr card_nr_lb\"><h4 class=\"card_bt\">总样本平均数和方差怎么算</h4><div class=\"download_card_msg\">&ensp;&ensp;&ensp;&ensp;当方差分析中只涉及一个因素，其他因素尽可能不变时，称为单因素方差分析。例如，图6－1中要检验的是部门被投诉次数的均值是否相等，这里只涉及“部门”这一个因素，所以是单因素方差分析，它研究“部门”。下面小编给大家分享总样本平均数和方差怎么算，希望能帮助到大家。 总样本平均数和方差怎么算文档下载网址链接：</div></div><div class=\"download_card_btn download_card_btn_lb\"><div class=\"content_box_tj\"><span>推荐度：</span><img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\"></div><div class=\"downlod_btn_right demo_tc downlod_btn_right_lb\"><em class=\"downlod_icon\"></em>点击下载文档<span>文档为doc格式</span></div> </div></div></a>';
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