Language for Discrete RV

# Language for Discrete RV - Notes on Language for Discrete...

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Notes on Language for Discrete Random Variables This is a short list of the more common phrases and expressions used in problems in discrete random variables that may used to specify the values of interest. This list is not exhaustive. For discrete random variables (denoted below as rv) X, the values x are integers, that is, whole numbers, in the range of the random variable. (Note that E(x) may occasionally be a whole number, depending on the situation; in general it is not a whole number, but is generally a real (decimal) number.) 1. “more than x” means all possible integer values that are strictly greater than x (not including x); all integer values > x. 2. “x or more” means all possible integer values that are greater than or equal to x (including x); all integer values ≥ x. 3. “at least x” means all possible integer values that are greater than or equal to x (including x); all integer values ≥ x. Note that “at least x” means “x or more.” Note that although 2 and 3 have different wording, they both mean the same values of x. 4. “less than x” or “fewer than x” means all possible integer values that are strictly less than x (not including x); all integer values < x. 5. “x or less” or “x or fewer” means all possible integer values that are less than or equal to x (including x); all integer values ≤ x. 6. “at most x” means all possible integer values that are less than or equal to x

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Language for Discrete RV - Notes on Language for Discrete...

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