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5. Test per proporzioni: confronto tra campioni e ... - statistica.it

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X<br />

0<br />

1<br />

2<br />

3<br />

>3<br />

45<br />

40<br />

35<br />

30<br />

25<br />

20<br />

15<br />

10<br />

5<br />

0<br />

6. TEST PER PROPORZIONI<br />

4) Calcolo delle frequenze attese π i . O<br />

O i<br />

39<br />

34<br />

13<br />

1<br />

0<br />

Osservati<br />

Attesi<br />

π i<br />

e -0.7241 =0.4847<br />

e -0.7241. (0.7241) 1 =<br />

0.3510<br />

e -0.7241.<br />

(0.7241) 2 /2=0.1271<br />

e -0.7241.<br />

(0.7241) 3 /6=0.0306<br />

1-0.4847- 0.3510-0.1271-<br />

0.0306 = 0.0065<br />

π i .O<br />

0.4847 . 87=42.17<br />

0.3510 . 87=30.54<br />

0.1271 . 87=11.06<br />

0.0306 . 87=2.66<br />

0.0625 . 87=0.54<br />

0 1 2 3 >3<br />

MARTA BLANGIARDO – TEST PER PROPORZION - 6.57

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