Introduction Geometric Distribution

The probability that Jalen makes a free throw is 75%. What is the probability he makes his first free throw on his third attempt?

• geometcdf(3, 0.75)

• geometpdf(0.75, 3)

• geometpdf(3, 0.75)

• geometcdf(0.75, 3) 

If you want to know how many trials you will need before your first success, use the ------ model.

• Geometric

• Binomial

• Normal

• Calculator

Which of the following distribution satisfy the lack of memory property?

• Poisson

• Geometric

• NBD

• Binomial

If X →Geometric distribution & mean of X is 1, then parameter of geometric distribution is ------

• 0.4

• 0.5

• 0.6

• 0.25

counts the number of trials needed to obtain the 1st success. X = 1,2,3,…

• Geometric

• Binomial

• Both

• Neither

If we want to calculate the probability of rolling a 6 for the first time on the 6^th roll of a die, would we use the geometric or the binomial distribution?

• geometric

• binomial

If you want to know how many trials you will need before your first success, use the ????? model.

• Geometric

• Binomial

• Normal

• Calculator

Is this a geometric random variable?

There are 20 fish in a lake, five trout and fifteen bass. You won't stop catching fish until you catch a trout. After you catch each fish, you throw it back. Once you get a trout, you will stop fishing. Let "x" = how many fish you catch.

[Assume all fish are equally likely to be caught.]

• Yes

• No

Which of the following trials is geometric?

• the number of text messages until you get one from your mom

• the number of text messages that your mom sent

• the number of times the phones rings in a day

• The number of texts in a row that your mom sent

Is this a geometric setting?

Shake a bag of 30 marbles, with 10 red marbles, 10 blue marbles, and 10 green marbles. Reach into the bag and pull out a marble. Put the marble back in the bag and shake again. Repeat until you get a green marble. Let G=The number of trials until you get a green marble

• No, there is a set number of trials

• Yes, this successfully satisfies the conditions

• No, the trials are not independent

• No, there are no binary outcomes