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<p> </p> <div align="center"> <table style="background-color: #ffffcc; background-image: none; color: #003300; 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: #ffffcc; text-align: center; vertical-align: middle; border-style: none;" valign="top" width="NaNpx"><span style="font-size: large;">Coeficient de correlació de Pearson</span></td> </tr> <tr> <td valign="top" width="NaNpx"> <div align="justify"><strong><span style="color: #003800;">Mesura el grau de correlació. </span><br /><span style="color: #003800;">Si és positiu, la correlació és directa; si és negatiu, la correlació és inversa.</span><br /><span style="color: #0a3800;">Si, en valor absolut, és superior a 0,5, la correlació és forta; en cas contrari, és dèbil.</span></strong><br /><strong><span style="color: #003800;">Es calcula amb: </span></strong></div> <div align="center"><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi mathvariant=¨bold¨ mathcolor=¨#003300¨»r«/mi»«mo mathcolor=¨#003300¨»§#160;«/mo»«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»«/math»</span></div> </td> </tr> </tbody> </table> </div>
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