Suppose that in a randomly selected week, Raven learns approximately 12 new spelling words.  Let X count the number of new spelling words that Raven learns each week.  Assume that X follows a Poisson distribution. Based on the scenario, we can say that X∼Poisson(λ=12).  What all does λ represent? Group of answer choices Variance Mean Standard Deviation Mean and Variance   Compute the probability that in a randomly selected week, Raven learns more than 15 new spelling words.

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