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hellotony1981

回归模型中怎样取舍多个变量啊？？？

guaotian

< 0pt? 0cm>中国人民银行通过多次的降息，现在的整存整取的利率如下
<p><TABLE cellSpacing=0 cellPadding=0 border=1 0cm 5.4pt? 5.4pt mso-padding-alt: .5pt; windowtext solid mso-border-alt: fixed; mso-table-layout-alt: collapse; BORDER-COLLAPSE: none; medium BORDER-BOTTOM: BORDER-LEFT: 22.65pt; MARGIN-LEFT: BORDER-TOP:><TR 17pt?><TD vAlign=top width=81 windowtext BORDER-BOTTOM: BORDER-LEFT: BORDER-TOP: transparent? BACKGROUND-COLOR: 17pt; HEIGHT: solid; 0.5pt 0cm; PADDING-TOP: 60.75pt; WIDTH: PADDING-BOTTOM: 5.4pt; PADDING-LEFT: PADDING-RIGHT:>< 0pt? 0cm>一 年 期<p><p></TD><TD vAlign=top width=82 windowtext solid BORDER-BOTTOM: BORDER-LEFT: BORDER-TOP: BACKGROUND-COLOR: 17pt; HEIGHT: solid; 0.5pt 0cm; PADDING-TOP: WIDTH: PADDING-BOTTOM: 5.4pt; PADDING-LEFT: PADDING-RIGHT: .5pt? mso-border-left-alt: transparent; 61.5pt; #c0c0c0;>< 0pt? 0cm>二 年 期<p><p></TD><TD vAlign=top width=81 windowtext solid BORDER-BOTTOM: BORDER-LEFT: BORDER-TOP: BACKGROUND-COLOR: 17pt; HEIGHT: solid; 0.5pt 0cm; PADDING-TOP: 60.75pt; WIDTH: PADDING-BOTTOM: 5.4pt; PADDING-LEFT: PADDING-RIGHT: .5pt? mso-border-left-alt: transparent; #c0c0c0;><P 0pt? 0cm>三 年 期<p><p></TD><TD vAlign=top width=81 windowtext solid BORDER-BOTTOM: BORDER-LEFT: BORDER-TOP: BACKGROUND-COLOR: 17pt; HEIGHT: solid; 0.5pt 0cm; PADDING-TOP: 60.75pt; WIDTH: PADDING-BOTTOM: 5.4pt; PADDING-LEFT: PADDING-RIGHT: .5pt? mso-border-left-alt: transparent; #c0c0c0;><P 0pt? 0cm>五 年 期<p><p></TD></TR><TR 17.7pt?><TD vAlign=top width=81 windowtext solid BORDER-BOTTOM: BORDER-LEFT: BORDER-TOP: BACKGROUND-COLOR: HEIGHT: solid; 0.5pt 0cm; PADDING-TOP: 60.75pt; WIDTH: PADDING-BOTTOM: 5.4pt; PADDING-LEFT: PADDING-RIGHT: .5pt? transparent; #c0c0c0; mso-border-top-alt: 17.7pt;><P 0pt? 0cm>3.78%<p><p></TD><TD vAlign=top width=82 .5pt; windowtext solid BORDER-BOTTOM: BORDER-LEFT: BORDER-TOP: BACKGROUND-COLOR: HEIGHT: solid; 0.5pt 0cm; PADDING-TOP: WIDTH: PADDING-BOTTOM: 5.4pt; PADDING-LEFT: PADDING-RIGHT: .5pt? mso-border-left-alt: transparent; 61.5pt; #c0c0c0; mso-border-top-alt: 17.7pt;><P 0cm 2.85pt? 0pt>3.96%<p><p></TD><TD vAlign=top width=81 .5pt; windowtext solid BORDER-BOTTOM: BORDER-LEFT: BORDER-TOP: BACKGROUND-COLOR: HEIGHT: solid; 0.5pt 0cm; PADDING-TOP: 60.75pt; WIDTH: PADDING-BOTTOM: 5.4pt; PADDING-LEFT: PADDING-RIGHT: .5pt? mso-border-left-alt: transparent; #c0c0c0; mso-border-top-alt: 17.7pt;><P 0cm 0pt 5.1pt?>4.14%<p><p></TD><TD vAlign=top width=81 .5pt; windowtext solid BORDER-BOTTOM: BORDER-LEFT: BORDER-TOP: BACKGROUND-COLOR: HEIGHT: solid; 0.5pt 0cm; PADDING-TOP: 60.75pt; WIDTH: PADDING-BOTTOM: 5.4pt; PADDING-LEFT: PADDING-RIGHT: .5pt? mso-border-left-alt: transparent; #c0c0c0; mso-border-top-alt: 17.7pt;><P 0cm 2.85pt? 0pt>4.5%<p><p></TD></TR></TABLE><P 0pt? 0cm>现有一位刚升入初一的学生，家长欲为其存1万元，以供6年后上大学使用，若此期间利率不变，问采用怎样的存款方案，可使6年所获收益最大？最大收益是多少？<p><p>

hellotony1981

<>一个一个算，然后比较啊！！！</P>

liuyh

复旦大学出的一本书,又和这个类似的题目