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Flashcards in AP Stats Exam Review Deck (4)
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1
Q

when do you use binomial distribution?

A
  1. fixed number of trials (n)
  2. 2 outcomes, success and failure
  3. probability of success the same for each trial
    Want to know “what is the probability of X successes in n trials”
2
Q

Binomial Distribution–20 trials, probability of success = 0.35, what is the probability of 5 successes?

A

Calculator:

binomialpdf(20, .35. 5)

3
Q

Binomial Distribution–20 trials, probability of success = 0.35, what is the probability of 5 successes or less?

A

Calculator:

binomialcdf(20, .35, 5)

4
Q

What is stratified sampling?

A

Divide the whole group into subgroups, such as high school into freshman, sophomores, juniors seniors, or a whole group into males and females, randomly sample from each group