Geometric Setting

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

Alma wrote a phone app. She has noticed that 3% of the users who download her app upgrade it the same day. Let N be the number of customers who download Alma's app until one upgrades it on the same day. Assume that the probability of each user's upgrades are independent.What type of variable is N?

• Geometric

• Binomial

• Both

• Neither

Which type of setting is described in the following scenario? Shuffle a standard deck of 52 playing cards. Turn over the top card. Put the card back in the deck, and shuffle again. Repeat this process until you get an ace. Count the number of cards you had to turn over.

• Binomial

• Geometric

• Neither

Which type of setting is described in the following scenario?

In the Japanese game show Sushi Roulette, the contestant spins a large wheel that' divided into 12 equal sections. Nine of the sections show a sushi roll, and three have a "wasabi bomb." When the wheel stops, the contestant must eat whatever food applies to that section. Then the game show host replaces the item of food on the wheel. To win the game, the contestant must eat one wasabi bomb. Find the probability that it takes 3 or fewer spins for the contestant to get a wasabi bomb.

• Binomial

• Geometric

• Neither

Which type of setting is described in the following scenario? Biologists estimate that a randomly selected baby elk has a 44% chance of surviving to adulthood. Assume that this estimate is correct. Suppose researchers choose 7 baby elk at random to monitor. What is the probability that the first elk to survive to adulthood is the 4th elk chosen to be monitored?

• Binomial

• Geometric

• Neither

A set of 20 cards consists of 10 purple cards and 10 green cards.  If you randomly pick a card after shuffling them and replace the card each time and wait until you get your first purple, what distribution is it

• binomial

• geometric

• neither

• normal distribution

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

• Geometric

• Binomial

• Both

• Neither

What’s the probability that the fifth chip you test is the first bad one you find?

• Binomial Distribution

• Geometric Distribution

About 8% of males are colorblind. A researcher needs some colorblind subjects for an experiment and begins checking potential subjects. 

c) What’s the probability that the first colorblind man found will be the sixth person checked?

• Binomial Distribution

• Geometric Distribution