Statistics (Applied) Flashcards
If y = ax^n , what is log(y) ?
Log(a) + nlog(x)
When is a one-tailed test used?
When ρ is either greater or less than 0
When is a two-tailed test used?
When ρ is not equal to 0
What are the hypotheses for a one-tailed test?
H⁰: ρ=0 , H¹: ρ>0/ρ<0
What are the hypotheses for a two-tailed test?
H⁰: ρ=0 , H¹: ρ≠0
In Set Notation, how is the event ‘A and B’ written?
AnB
If A and B are independent, what is P(AnB)?
P(A) x P(B)
If A and B are mutually exclusive, what is P(AnB)
0 (it doesn’t exist, as they don’t intersect)
In Set Notation, how is the event ‘A or B’ written?
AUB
If A and B are mutually exclusive, what is P(AUB)?
P(A) + P(B)
In Set Notation, how is the event ‘Not A’ written?
A’
What is the formula for P(A’)?
1 - P(A)
In Set Notation, how is the probability that B occurs given that A has already occurred written?
P(B/A)
For independent events, what P(A/B) the same as?
P(A/B’) = P(A)
What is the formula for P(AUB)?
P(A) + P(B) - P(AnB)
