
Statistica Quiz 4
Authored by Vlad Bocanet
Education
University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Abaterea standard a eșantionului se notează cu:
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Aria de sub o distribuție de probabilitate este
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dacă o variabilă este normal distribuită în jurul mediei de 10 cu sigma=2, probabilitatea de a obține o valoare între 8 și 12 este:
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pentru un risc bilateral simetric de 10%, nivelul de încredere este:
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dacă vrem să estimăm media populației și știm abaterea standard a populației, folosim distribuția:
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Distribuția Chi-pătrat se folosește la estimarea:
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pentru un eșantion de 12 valori, nr. de grade de libertate este:
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