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Finding Poisson Probabilities-Excel definitions

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  • Poisson Distribution
    A discrete probability model for counting occurrences of events within a fixed interval, given a constant average rate.
  • Excel Function
    A built-in formula in spreadsheet software that automates calculations, requiring specific arguments for operation.
  • POISSON.DIST
    A specialized Excel function for calculating probabilities related to Poisson-distributed events using three arguments.
  • Argument
    A value or input placed within a function's parentheses, determining how the function operates and what it calculates.
  • Occurrence
    An event or instance being counted in a probability problem, such as orders placed in a given time period.
  • Mean
    The average rate at which events happen in a Poisson process, often denoted by the Greek letter lambda.
  • Lambda
    A parameter representing the expected number of events per interval in Poisson probability calculations.
  • Cumulative Probability
    The likelihood that the number of events is less than or equal to a specified value, calculated by setting cumulative to true.
  • Exact Probability
    The chance that the number of events matches a specific value, found by setting cumulative to false in Excel.
  • Complement Rule
    A principle stating that the probability of an event is one minus the probability of its opposite or complement.
  • Discrete Probability
    A probability model for scenarios where outcomes are countable and distinct, such as the number of orders received.
  • Formula Bar
    A location in Excel where functions and calculations are entered, allowing users to input or edit formulas.
  • Cell Reference
    An identifier for a specific location in a spreadsheet, used to access values or formulas for calculations.
  • Business Analytics
    A field applying statistical methods, like Poisson probabilities, to analyze and interpret business data.
  • Factorial
    A mathematical operation multiplying a number by all positive integers below it, often used in Poisson formulas.