Poisson Distribution Abd Hypergeometric Distribution MB2

Question 1

What is the Poisson distribution?

Answer 1

Measures the probability of a random event over some interval of time and space

Question 2

What are the two assumptions with Poissons distribution?

Answer 2

1. For the probability of occurrence of the event is constant for any two intervals of time or space
2. The occurrence of the event in any interval is independent of the occurrence in any other interval.

Question 3

What type of distribution is Poissons distribution?

Answer 3

A discrete distribution

Question 4

If a sample is selected without replacement from a known finite population and contains a relatively large proportion of the population, such as the probability of success is measurably altered from one selection to the next, which discrete random variable will you use?

Answer 4

Hypergeometric distribution

Question 5

What formula is below?

             (r) (N-r)
P(x) = (x) (n-x)
             ————-
                  (N)
                  (n)

What are the characteristics of this formula?

Answer 5

1. Must have a finite population

2. Successes and failures (r and n-r)