6 Flashcards
Binomial distribution?
Counting the number of successes among n independent trials where the probability of a success on each individual trial is p.
Conditions and questions in a binomial distribution? 4•
•How many trials, n?
•Trials must be independent
•Outcome of an individual trial can be classified as either a success or failure
•probability of a success p is fixed and the same for each trial
Bernoulli distribution is related to binomial how?
A binomial but only doing one trial and measuring either success or failure.
R can only do less than or equal to or just less than?
Less than or equal to?
R can only do greater than and equal to or only greater than?
Greater than
Geometric distribution?
Counts the number of trials until the first success among consecutive independent trials. Aka counts the number of failures until the first success among consecutive independent trials.
!!!Geometric distribution conditions and tests?
Poisson distribution (lambda)?
Count the number of occurrences of a given event over some interval where the rate of these occurrences over the given interval is equal to lambda.
!!!conditions and tests of Poisson distribution?
In discrete uniform distribution, each outcome MUST be?
Equally likely.
Geometric Distribution?
How many times you need to conduct a trial until you get the successive result.
Poisson Distribution?
There will be a rare event, and we want to know how many of them will happen over a certain amount of time.
In R, how does dbinom differ from pbinom?
dbinom is the probability mass function of binomial distribution, while pbinom is the cumulative distribution function of the binomial distribution.