Formulas Flashcards
Conditions for Poisson distribution
Random and independent events
constant rate
sigularly
Conditions for Poisson distribution
Independent and random
Constant rate
Singularly
Conditions for discreet uniform distribution
Random variables can take an infinite number of values
equal probability
Variance CUD equation
1/12 (b-a)^2
Mew CUD equation
(a+b)/2
CUD graph y axis equation
a/(b-a)
Standard normal distribution equation
Z= (x-u)/o
Conditions for binomial distribution
Fixed trials
independent
2 options
equal success
When should Ho be rejected
If the % is lower than 5 (or asked for stat)
Binomial approximation conditions
If n is large
P is close to 0.5
Binomial approximation formulae (2)
u= np
o=root np(1-p)
How to preform continuity corrections to BA
x>5 —> Y>5.5
x=9 —> 8.5</= Y</=9.5
x<3 —> Y<3.5
How are correlations measured?
0= no correlation
When is Ho accepted in correlation moment testing
If r is smaller that the PMC