Parameters for negbinomial Function?

07162016, 10:02 PM
Post: #1




Parameters for negbinomial Function?
I do not understand the description of the negbinomial function in the Help system. My understanding of this probability mass function is that it provides the probability of r successes out of x trials when the probability of a success is equal to p. The HP Prime computation is P(X=x) = COMB(x1,r1)*(p^r)*(1p)^(xr). I defined a user function this way and confirmed its results.
I want to use the builtin function negbinomial(n,k,x) but I do not understand the parameters. How do n, k, and x here relate to the x, r, and p above? Thanks! 

07172016, 06:49 AM
Post: #2




RE: Parameters for negbinomial Function?
Quote:In probability theory and statistics, the negative binomial distribution is a discrete probability distribution of the number of successes in a sequence of independent and identically distributed Bernoulli trials before a specified (nonrandom) number of failures (denoted r) occurs.https://en.wikipedia.org/wiki/Negative_b...stribution 

« Next Oldest  Next Newest »

User(s) browsing this thread: 1 Guest(s)