normal distribution Flashcards
1
Q
what do you do first
A
Z - N ( mean, standard deviation^2 (variance) )
2
Q
standardisation eqt
A
z = X - M / o
3
Q
If it is on the left and to the left
A
REFLECT ON THE RIGHT
Then 1 - P(Z < no)
z = -z
1 - P (Z < -z)
4
Q
If it is on the left and to the right
A
REFLECT ON THE RIGHT
z = -z
P (Z < -z)
5
Q
If it is on the right and to the right
A
1 - P ( Z < no)
6
Q
When it is on the left
A
REFLECT TO THE RIGHT
z = -z
7
Q
If it is to the right
A
1 - P(Z < no) to go make it go to the left
8
Q
If there is a neg / pos skew
A
Should not do normal distribution b/c then it’s not symmetrical
9
Q
If P(A hump B)
A
Draw and shade and find the bit where the shading overlaps
10
Q
If P(A U B)
A
Draw and shade and find everything that is shaded
