What is the Pythagorean Theorem of Statistics?

SD2(X1+X2)= SD2(X1)+SD2(X2), VAR(X1+X2)= VAR(X1)+VAR(X2)

Quiz: Ch. 15: Nathan Urias

Imported from external platform

Answers

1
What is the definition of "disjoint events"?
All possible events of a situation
Events that don't alter if another happens
Events with the same probability
Events with no common element
2
When using "or" in a probability problem, you multiply probabilities.
False
True
3
Probabilities must fall between -1 and 1
False
True
4
Can Disjoint events be independent?
No
Yes
Sometimes
I really don't know
5
What is the Pythagorean Theorem of Statistics?
SD2(X1+X2)= SD2(X1)+SD2(X2)
e=mc2
VAR(X1+X2)= VAR(X1)+VAR(X2)
a2+b2=c2

Imported from external platform

Answers

1
What is the definition of "disjoint events"?
All possible events of a situation
Events that don't alter if another happens
Events with the same probability
Events with no common element
2
When using "or" in a probability problem, you multiply probabilities.
False
True
3
Probabilities must fall between -1 and 1
False
True
4
Can Disjoint events be independent?
No
Yes
Sometimes
I really don't know
5
What is the Pythagorean Theorem of Statistics?
SD2(X1+X2)= SD2(X1)+SD2(X2)
e=mc2
VAR(X1+X2)= VAR(X1)+VAR(X2)
a2+b2=c2