Probability Density Functions Flashcards
0
Q
How to find the value of an unknown constant?
A
Integrate between the inequality values (the extremes of the graph) and it will be equal to 1
1
Q
In a probability density function, the area between the inequality is?
A
The area under the graph and is equal to 1
2
Q
How to find the median, P(X<M) =?
A
Intergrate between the lowest value and M. It is equal to 1/2.
3
Q
How to find the mean, mew, E(X) =
A
Integrate the function multiplied by x xf(x)dx between the values of the inequality.
4
Q
How to find the variance, Var(X)= ?
A
Times the function by x squared and integrate between the inequality values. Take away the mean squared.
