Discrete Probability (Geometric)

Question 1

What are the four traits of a geometric distribution?

Answer 1

1) only 2 possible outcomes
2) independent of each other
3) probability of success is always the same
4) variable of interest is the number of trials before success

Question 2

Find the probability of getting a success on the 5th trial with 10% chance of success.

Answer 2

(1-0.1)^4•0.1

Question 3

what is the difference between geometric cdf and geometric pdf?

Answer 3

cdf= winning on a certain trial 
pdf= winning on or before a certain trial

Question 4

What is the probability that is the probability of success is 25% and you have to find the probability that you get zero successes the first 10 trials?

Answer 4

1-geometric cdf (.25,10) =.0563