TI 92 programs for SM230
 
 

binomial	S(ncr(n,k)*p^k*(1-p)^(n-k),k,a,b)
negative binomial	S(ncr(x-1,k-1)*p^(k-1)*(1-p)^(x-k),x,a,b)
hypergeometric	S(ncr(nn-k,n-x)*ncr(k,x)/ncr(nn,n),x,a,b)
Poisson	S((ell*t)^k*e^(-ell*t)/k!,k,a,b)

• After entering the binomial formula, hit return, then go to the end of the line and type
  sto bin
• After entering the negative binomial formula, hit return, then go to the end of the line and type
  sto nbin
• After entering the hypergeometric formula, hit return, then go to the end of the line and type
  sto hyper
• After entering the Poisson formula, hit return, then go to the end of the line and type
  sto poisson
• Here S denotes the summation symbol (2nd 4, on the TI92), the Greek letter Sigma, which html doesn't have.
• Here nn is used instead of N, which seems to have a problem being recalled from memory in the TI92.
• Here ell is for lambda, which the TI92 will not use for storing.
• ! is 2nd w.

Example: Suppose you want to compute P(X <= 3), where X is binomial with n=5, p=.5. You can type
.5->p (where -> is the sto button)
5->n
0->a
3->b
2nd sto bin (hit enter twice)
You should see .8125
 

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David Joyner 3-8-2002, wdj