Statistics stuff Flashcards
(13 cards)
what is the binomial distribution?
bi means 2, so either gonna happen or failure. formula for it.
what does (pā) mean? - in probailtiy
The chance of the event p not happening
what does A union B mean?
Means A or B or both, so the whole interior venn diagram if it was 2 circles
what does A intersection B mean?
A and B, so just where the circles overlap
how do you find A union B?
probability of A + probability of B - probability of the intersection
what does independent probability mean? formulea?
2 events do not affect one another. so A intersection B = A times B
what does mutually exclusive mean? formulea?
when 2 events cant happen at the same time. A intersection B = 0
What does p (A I B) mean? formulea?
the probability of A given that B has happened.
What is the binomial distribution statement(? what does n and x mean? what is the probability of failure?
X binomially distributed B ( n, p) wiggle thing between B and X. n is the number of trials. P is the chances of success 1 - P
What is the binomial distribution equation? - just use calculator
like binomial expansion P(X=r) = (nCr) x P^r x (1 - p)^ n - r P = probability r = outcome you want n is number of trials
When do u use binomial Pd and Cd on the calculator?
When do you use list and variable?
For a particular binomial probability use Pd
Variable for a single event.
List for multiple events
What is the null hypothesis?
What does it mean by rejecting the null hypothesis?
The normal range of expections.
When the information is unusal enough we have evidence to suggest that what we thought was normal is not and we can reject the null hypothesis
What is the critical region?
The crictal region is the level of results we need to say we have evidence to suggest
