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IB DP Maths: AI SL復(fù)習(xí)筆記4.5.2 Calculating Binomial Probabilities

Category: IB課程, 教材筆記, 福利干貨 Date: 2022年7月19日 下午3:48

Calculating Binomial Probabilities

How do I calculate?P(X?=?x):?the probability of a single value for a binomial distribution?

  • You should have a?GDC?that can calculate?binomial probabilities
  • You want to use the "Binomial Probability Distribution" function
    • This is sometimes shortened to BPD, Binomial PD or Binomial PdfHow do I calculate P(a?≤?X?≤?b):?the cumulative probabilities for a binomial distribution??
  • You should have a?GDC?that can calculate?cumulative binomial probabilities

How do I find probabilities if my GDC only calculates P(X?≤?x)?

  • To calculate P(X?≤?x) just enter?x?into the cumulative distribution function
  • What if an inequality does not have the equals sign (strict inequality)??

Exam Tip

  • If the question is in context then write down the inequality as well as the final answer
    • This means you still might gain a mark even if you accidentally type the wrong numbers into your GDC

Worked Example

4-5-2-ib-ai-aa-sl-binomial-prob-a-we-solution

4-5-2-ib-ai-aa-sl-binomial-prob-b-we-solution

4-5-2-ib-ai-aa-sl-binomial-prob-c-we-solution

 

 

 

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