Let x be a random variable that represents the amount of a

Reference no: EM13624946

Let x be a random variable that represents the amount of a randomly selected monthly cell phone bill. We know that x has a normal distribution with a mean of µ = $67.50 and a standard deviation of ? = $16.09. What is the probability that the mean amount of five cell phone bills taken at random is between $63.50 and $71.50?

Reference no: EM13624946

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