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    When using the tables for the binomial and poisson distributions, does it matter if the sign is 'less than' or 'less than or equal to'/'more than' or 'more than or equal to'?
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    Yes the tables give you the values for less than or equal to
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    (Original post by yelllowribbon)
    When using the tables for the binomial and poisson distributions, does it matter if the sign is 'less than' or 'less than or equal to'/'more than' or 'more than or equal to'?
    Yes - they are discrete distributions: \mathbb{P}(X < k+1) = \mathbb{P}(X \leq k) - the tables give values for \mathbb{P}(X \leq k).

    So if you wanted to compute \mathbb{P}(X < 5) where X is distributed binomially or with a poisson distribution using the tables, you would need to convert this to \mathbb{P}(X \leq 4) then look up 4 using tables.
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    (Original post by Jordan97)
    Yes the tables give you the values for less than or equal to
    you can find tables which work the other way, but all the exam tables in this country are ≤
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    (Original post by Zacken)
    Yes - they are discrete distributions: \mathbb{P}(X < k+1) = \mathbb{P}(X \leq k) - the tables give values for \mathbb{P}(X \leq k).

    So if you wanted to compute \mathbb{P}(X < 5) where X is distributed binomially or with a poisson distribution using the tables, you would need to convert this to \mathbb{P}(X \leq 4) then look up 4 using tables.
    Cool, thanks
    And just checking, but normal tables are continuous, right? So for them it doesn't matter if its 'less than' or 'less than or equal to'
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    (Original post by yelllowribbon)
    Cool, thanks
    And just checking, but normal tables are continuous, right? So for them it doesn't matter if its 'less than' or 'less than or equal to'
    Yes, a normal distribution is a continuous one - it has the property that \mathbb{P}(X \leq k) = \mathbb{P}(X < k).
 
 
 
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