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Mathematics 7 Online
OpenStudy (anonymous):

x

OpenStudy (anonymous):

@AlexandervonHumboldt2

OpenStudy (hitaro9):

So let's look at the definition of Binomial setting

OpenStudy (hitaro9):

A binomial setting is one which satisfies the following conditions: 1) each observation falls into one of two categories called a success or failure 2) there is a fixed number of observations 3) the observations are all independent 4) the probability of success (p) for each observation is the same - equally likely

OpenStudy (hitaro9):

So let's go through and look at each one. 1) each observation falls into one of two categories called a success or failure Is this true or false?

OpenStudy (anonymous):

false

OpenStudy (hitaro9):

Hmm, why do you think that?

OpenStudy (anonymous):

oh i guess it is true because there is a 70% chance of making the basket and 30% not making it

OpenStudy (anonymous):

so each time he tries to do a free throw there is a chance he succeeds and a chance he fails

OpenStudy (hitaro9):

Yes exactly!

OpenStudy (hitaro9):

Okay, so 1) is true, let's go on to two 2) there is a fixed number of observations

OpenStudy (anonymous):

this is true, there are 10

OpenStudy (hitaro9):

Yes exactly.

OpenStudy (hitaro9):

3) the observations are all independent

OpenStudy (anonymous):

i think this is true, but I am unsure why

OpenStudy (hitaro9):

You're right. Every single shot has a 70% chance of success. If he made the last shot, it doesn't improve his chances at this shot, because each shot is completely independent

OpenStudy (hitaro9):

Kinda like if I flip a coin and it lands on heads. The chance it lands on heads again next flip is still 50%, because previous results have no influence on this chance of success or failure

OpenStudy (hitaro9):

Does that make sense, or should I break it down further?

OpenStudy (hitaro9):

Alright and 4) the probability of success (p) for each observation is the same - equally likely

OpenStudy (anonymous):

true? there is a 70% probability

OpenStudy (hitaro9):

Yep, you got it. So since all 4 requirements are satisfied, it is a binomial setting.

OpenStudy (hitaro9):

90% of that was you c: Any more problems you think you may need help with?

OpenStudy (hitaro9):

Alright then, have fun with it

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