
pyt matma p.jurasinska
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Mathematics
11th Grade

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5 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Średnia arytmetyczna wieku 12 kobiet wynpsi 26 lat, a 9 mężczyzn 31 lat. Średnia arytmetyczna tych 20 osób wynosi:
28,5
28
27,5
29
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Oblicz średnią ważoną
8,00
2,25
2,00
1,75
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Wyznacz medianę zestawu: 1,5,3,8,9
5
3
1
9
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Dany jest ciąg uporządkowany: 2,7,7,a,9,b,14,15. Wyznacz dominantę, wiedząc, że ukryte wyrazy są inne niż podane w ciągu (np. nie powtarza się 7,9,14)
2
7
8
3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pewna firma spedycyjna rozwiozła następującą liczbę paczek w danych miesiącach. Ustal, w których miesiącach liczby paczek mieszczą się w przedziale (śr.aryt + sigma ; śr.aryt - sigma). Ile wynosi odchylenie standardowe?
50,21
25,22
-25,22
-50,21
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