(Solved) Suppose that the daily number of errors a randomly-selected bank

July 21, 2017UncategorizedBy classhelp24@gmail.com [email if you need fresh paper done]

Suppose that the daily number of errors a randomly-selected bank teller makes is denoted by X and follows the distribution given in the table below.? A human resource manager records the daily numbers of errors of two randomly selected tellers. Denote the associated random variables by X₁ and X₂. As the selection is random, X₁ and X₂ are independent and follow the same distribution as X. The manager then computes the sample mean

? where the sample size is n = 2. ??

x	0	1	2
P(X = x)	0.6	0.2	0.2

??????

Find the mean and variance of X₁. Explain why we do not need to find the mean and variance of X₂ once we know those of X₁.

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