Question

Can someone check my answers? Expert stats ?????

Answer 1

In the geometric setting the trials are independent, each trial has just two possible outcomes (success and failure), the probability of success is the same for each trial (referred to as p), and the random variable X is the number of trials required to get the first success. Which of the following scenarios meets the requirements of a geometric setting?

A sack has 8 red dice and 9 green dice. I remove one die at a time (and don't replace it) until I get my first red die. What's the probability I get a red die on the eighth draw?

A market research firm hires operators to conduct telephone surveys. Going down an alphabetical list of names in the telephone directory, a computer dials a telephone number and the operator asks the respondent whether they have time to answer some questions. What's the probability someone will answer yes by the fifth call?

There are 10 different prizes in boxes of Googily-Snaps. Prize four is the most valuable among collectors. What's the probability that I'll get prize four without having to buy more than 4 boxes?

Puff Pop Popcorn Company claims there will be fewer than 15 unpopped kernels in each bag of their microwave popcorn. You count the number of kernels in a bag of popcorn, and then pop the entire bag. You then eat the popcorn one kernel at a time starting at the top of the bowl. What's the probability that you'll pick an unpopped kernel by the 15th pick?

Suppose you've been to a game reserve where there are lots of different types of birds: pigeons, robins, finches, woodpeckers, falcons, white owls, eagles, peawingspans, and many more. What's the probability you'll come across a falcon by the tenth bird you see?

I chose B

Answer 2

Ok you are correct

Answer 3

In every example there is more than 1 event that can occur
Except for B which only has 2 events. Its either yes or no

Answer 4

can you run thru and define why you think the others are wrong?

Answer 5

hehehe that most likely wont occur once he has the answer -.-

Answer 6

i just dont accept your reasoning for dismissing the others. or rather, i dont see how its valid.

Answer 7

hmmm well actuallly the popcorn one tooo
Its either popped or unpopped

Answer 8

In the geometric setting the trials are independent,
the outcome of one trial does not
effect the outcome of another

each trial has just two possible outcomes (success and failure),
what is a success and what is a failure for each situation?


the probability of success is the same for each trial (referred to as p),
the probability of is independant of the individual trial.


and the random variable X is the number of trials required to get the first success.
P(X<=N)
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First one is not independant, due to the piece is not replaced. Has nothing to do with 'more than one event' occuring

Answer 9

the first trial effects the outcome of the second

Answer 10

hmmmm i see what you are saying

Answer 11

There are 10 different prizes in boxes of Googily-Snaps. Prize four is the most valuable among collectors. What's the probability that I'll get prize four without having to buy more than 4 boxes?

its independant, opening one box does not effect the probability of another box

the probability of getting prize4 remains the same for each trial, or does it?

this might not be good based on the number of trials being defined oddly .... but im not sure

Answer 12

Suppose you've been to a game reserve where there are lots of different types of birds: pigeons, robins, finches, woodpeckers, falcons, white owls, eagles, peawingspans, and many more. What's the probability you'll come across a falcon by the tenth bird you see?

Finding a bird and killing it changes the probability, but just spotting one doesnt change

the "many many more" part seems to indicate that actually defining the probability is not possible with the given information

Answer 13

say i have 2 peas, 3 jelly beans, and some popcorn .. whats the probability that i pick a jelly bean out of the mix?

Answer 14

hmmmm

Answer 15

i see what you are saying ....

Answer 16

There are 10 different prizes in boxes of Googily-Snaps. Prize four is the most valuable among collectors. What's the probability that I'll get prize four without having to buy more than 4 boxes?
This can be worded to as
Whats the probability of getting prize 4 at least on opening the 4th box?

Answer 17

So then all of them are in the geometric setting except for the first one
That just confuzzled my brain lol