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2 na stran
2 na stran
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4.8 Kvadrat<strong>na</strong> sredi<strong>na</strong><br />
• Kvadrat<strong>na</strong> sredi<strong>na</strong> RMS je e<strong>na</strong>ka pozitivni vrednosti<br />
kvadratnega kore<strong>na</strong> sredine vsote kvadratov opazovanih<br />
vrednosti:<br />
RMS<br />
N<br />
∑<br />
i=<br />
1<br />
=<br />
N<br />
x<br />
2<br />
i<br />
(4.10)<br />
91<br />
4.8 Kvadrat<strong>na</strong> sredi<strong>na</strong> / 2<br />
Primer 4.13: Za ocene iz primera 3.1 izraču<strong>na</strong>jmo<br />
kvadratno sredino.<br />
• Število enot: 19<br />
Kvadrat<strong>na</strong> sredi<strong>na</strong> ocen je:<br />
• Podatki:<br />
5, 7, 8, 7, 3, 4, 2,<br />
8, 6, 1, 9, 6, 6, 6,<br />
7, 2, 6, 5, 4<br />
RMS =<br />
=<br />
5<br />
2<br />
N<br />
∑<br />
i=<br />
1<br />
N<br />
x<br />
2<br />
i<br />
=<br />
2<br />
+ 7 + ⋅⋅⋅ + 4<br />
19<br />
2<br />
= 5.79<br />
92<br />
•46
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