Describe the two components of a random sample

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1. Describe the two components of a random sample.

2. If n = 10 observations are randomly sampled from a distribution with mean µ = 9 and variance σ² = 8, what is the mean and variance of the sample mean?

3. Determine E(X‾) and σ_x² for a random sample of n = 12 observations from a discrete distribution with the following probability function:

X:	1	2	3	4
P(x):	.2	.1	.5	.2

Reference no: EM131398352

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