Stats Flashcards
1
Q
Points needed for binomial distribution?
A
-probability needs to stay constant (shows they are independent)
-Have n
2
Q
If a and b are mutually exclusive?
A
P(AuB)=P(A)+P(B)
3
Q
If a and b are independent?
A
P(AnB) = P(A) x P(B)
4
Q
Mutually exclusive?
A
Not being able to happen at the same time or together (impossible)
5
Q
Independent?
A
One event occurring doesn’t change the probability of the other event
6
Q
Outlier equation?
A
Lower outlier- Q1 - (1.5 x IQR)
Upper outlier- Q3 + (1.5 x IQR)
7
Q
Positive skew?
A
Median closer to LQ than UQ
8
Q
Negative skew?
A
Median closer to UQ than LQ
9
Q
What happens to median if outlier is removed?
A
-stay the same or decrease (we don’t know unless we have all the individual values)
10
Q
How to work out P(AnB’)
A
P(A) - P(AnB)
