Let X Be a Binomial Random Variable with N =

Short Answer

Let x be a binomial random variable with n = 25 and p = 0.3.
Is the normal approximation appropriate for this binomial random variable?
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Find the mean for x.
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Find the standard deviation for x.
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Use the normal approximation to find .
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Use the cumulative binomial probabilities table in Appendix 1 of your book to calculate the exact probability, above.
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Compare the results of the last two questions. Was your approximation close, or far, from the exact answer?
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