CRV Flashcards
1
Q
what is a continous random variable
A
a variale that can ake any value within a range e.g. height/ weight
2
Q
in cvr what is the area under the pfd curve?
A
it is always equal to one
3
Q
formula for E(x)
A
∫f(x) dx
4
Q
E(aX+b)
A
aE(x)+b
5
Q
Var(aX+b)
A
a^2Var(x)
6
Q
how do you work out the rectangular distribution?
A
look in th FB for the formula
7
Q
what is F(x)
A
it is the cumulative distribution function- it finds everything to the left of a certain value. it is the integral of f(x)
8
Q
what do you do if you need to find the probablity of a cvr?
A
intergrate f(x) for the probablitity e.g. p(2
