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4. Given the following binomial data, compute the mean and the standard deviation. A waiter is curious about the number of couples who split the

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4. Given the following binomial data, compute the mean and the standard deviation. A waiter is curious about the number of couples who split the bill. One night, she seats 9 couples and notes that there is a 0.55 chance that they decide to split the bill between them. Find the mean and standard deviation of this binomial distribution

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