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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 671<br />

✬<br />

Izračunajmo najprej trend:<br />

T Yi ti Yi − Y (Yi − Y )ti t 2 i<br />

1986 89 −2 −19, 8 39, 6 4<br />

1987 100 −1 −8, 8 8, 8 1<br />

1988 118 0 9, 2 0 0<br />

1989 116 1 7, 2 7, 2 1<br />

1990 121 2 12, 2 24, 4 4<br />

544 0 80 10<br />

Y = 544<br />

= 1088,<br />

4<br />

YT = 108, 8 + 80<br />

t = 108, 8 + 8t,<br />

10<br />

YT (1991) = 108, 8 + 8 · 3 = 132, 8.<br />

Ocena za leto 1991 je pribliˇzno 133 doktorjev znanosti.<br />

✫<br />

Univerza v Ljubljani ▲<br />

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☛ ✖<br />

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