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2 cards from this section. Quick, good the night before a test.
Define the binomial distribution.
Think about how many outcomes can happen in situations with two results.
What does the term (n choose r) represent?
Consider how combinations work.
What is the formula for the binomial distribution?
Recall the definitions of n, r, and p.
True or False: The binomial distribution can only be used with a single trial.
Think about the trials' nature in relation to successes and failures.
A die is rolled 10 times. What is the probability of rolling a '4' exactly 3 times?
Use the probability for success (1/6) and failure (5/6) with the formula.
A survey shows that 70% of people prefer coffee over tea. What is the probability that in a group of 15 randomly selected individuals, exactly 10 will prefer coffee?
Identify p (0.7) as the preference for coffee and np for the expected outcomes.
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