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Barry Kissane
23
BINPROB
Purpose
To generate values for the binomial and cumulative binomial probability distributions.
Operation
Enter the number of trials (N) and the probability of success for each (P), followed by
in each case.
The probability of zero successes is displayed on the screen. Write this result down on
paper.
Then press to see the probabilities of getting various numbers of successes,
together with the associated cumulative probabilities. These are stored in List 1 and List
2 respectively. Any data already in these lists will be lost.
To test the program, consider the case of twelve tosses of a coin with probability 0.5 of
getting 'heads'. Check the following results:
The probability of obtaining no heads in the twelve tosses is about 0.00024.
The probability of obtaining six heads out of twelve tosses is about 0.22559.
The probability of getting six heads or less out of twelve tosses is about 0.61279.
Notice that the final value in List 2 is always 1. Why is this?