by doc_doc
Tags: helpplease, probability
doc_doc is offline
Jul24-04, 08:52 AM
P: 4
please i'm, taking statistic this term and i really have a problem with this question:
which is
for the distribution B(3,0.5),
a) how many outcomes are there to each trial?
b) how many trials are there?
c) how many possible values can the variable take?
d) what are the mean and standard daviations of this distribution?
please help me. if you can't just tell me who can help me ?
i'm beggining you
thanks alot
Phys.Org News Partner Science news on
Going nuts? Turkey looks to pistachios to heat new eco-city
Space-tested fluid flow concept advances infectious disease diagnoses
SpaceX launches supplies to space station (Update)
theFuture is offline
Jul24-04, 02:29 PM
P: 80
I assume you are talking about a binomial distribuition for n=3 and p=.5? Think about what a binomial distribution is. It counts the number of sucesses in n independent bernoulli trials that have sucess with probability p, right?

a) Well, what are the outcomes of a bernoulli trial?
b) Well, what is n?
c) Think about the sample space, how many possible successes can you get in n trials?
d)Well, the mean is the expectation and the SD is the root of the variance.

That should get you started.

Register to reply

Related Discussions
Probability Precalculus Mathematics Homework 10
I need some help with some probability Set Theory, Logic, Probability, Statistics 1
What's the difference between probability and probability density Quantum Physics 5
Probability / Probability density General Physics 2
Probability anyone? Introductory Physics Homework 6