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<p> </p> <div align="center"> <table style="background-color: #ffffcc; background-image: none; color: #660066; border: 4px solid #003300; float: none; text-align: left; vertical-align: top; width: 400px;" border="4" frame="void" rules="none"> <tbody> <tr align="center"> <td style="background-color: #003300; background-image: none; color: #ff9900; text-align: center; vertical-align: middle; border-style: none;" valign="top" width="NaNpx"><span style="font-size: large; color: #ffff99;"><span style="font-size: large;"><span style="font-size: large;">Recta de regressió</span></span></span></td> </tr> <tr> <td valign="top" width="NaNpx"> <div align="justify"><span style="font-size: small;"><strong><span style="color: #003300;">Si la correlació és lineal i forta, es pot ajustar la distribució a una recta, que permet fer prediccions, i que s'anomena recta de regressió.</span><br /><span style="color: #003300;">Es calcula amb:</span> <br /></strong></span></div> <div align="center"><span style="font-size: small;"><strong><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi mathvariant=¨bold¨ mathcolor=¨#003300¨»y«/mi»«mo mathcolor=¨#003300¨»§#160;«/mo»«mo mathcolor=¨#003300¨»-«/mo»«mo mathcolor=¨#003300¨»§#160;«/mo»«mover mathcolor=¨#003300¨»«mi mathvariant=¨bold¨»Y«/mi»«mo»§#175;«/mo»«/mover»«mo mathcolor=¨#003300¨»=«/mo»«mo mathcolor=¨#003300¨»§#160;«/mo»«mfrac mathcolor=¨#003300¨»«msub»«mi mathvariant=¨bold¨»§#963;«/mi»«mi mathvariant=¨bold¨»XY«/mi»«/msub»«mrow»«msub»«mi mathvariant=¨bold¨»§#963;«/mi»«mi mathvariant=¨bold¨»X«/mi»«/msub»«mo»§#183;«/mo»«msub»«mi mathvariant=¨bold¨»§#963;«/mi»«mi mathvariant=¨bold¨»Y«/mi»«/msub»«/mrow»«/mfrac»«mfenced mathcolor=¨#003300¨»«mrow»«mi mathvariant=¨bold¨»x«/mi»«mo»§#160;«/mo»«mo»-«/mo»«mo»§#160;«/mo»«mover»«mi mathvariant=¨bold¨»X«/mi»«mo»§#175;«/mo»«/mover»«/mrow»«/mfenced»«/math»</span></strong></span><br /><span style="font-size: small; color: #003300;"><strong>Si és la de Y sobre X</strong></span></div> </td> </tr> </tbody> </table> </div>
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Thursday, 23 August 2018, 11:09 AM
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