Which condition is required for a binomial probability model?
Correct answer: D. The trials are independent with fixed success probability
- A. The number of trials is random
- B. Each trial has more than two outcomes
- C. The success probability changes each trial
- D. The trials are independent with fixed success probability
Explanation
A binomial model requires a fixed number of independent trials, two outcomes per trial, and a constant success probability. If the probability changes or trials are dependent, the ordinary binomial model does not apply.
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