determine the number of cups of coffee a customer drinks with an evening meal at a restaurant. X 0 1 2 3 4 PX 0.20 0.32 0.42 0.02 0.04 Find the mean. Round the answer to two decimal places as needed. Mean: μ=   Find the variance. Round the answer to two decimal places as needed. Variance: σ^2=   Find the standard deviation. Round the answer to two decimal pla

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