IB DP Maths: AI HL复习笔记4.10.2 Calculating Poisson Probabilities

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

• You should have a GDC that can calculate Poisson probabilities
• You want to use the "Poisson Probability Distribution" function
  • This is sometimes shortened to PPD, Poisson PD or Poisson Pdf
• You will need to enter:How do I calculate P(a ≤ X ≤ b): the cumulative probabilities for a Poisson distribution? 

• You should have a GDC that can calculate cumulative Poisson probabilities

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

What if an inequality does not have the equals sign (strict inequality)?