Question

Random samples of size n were selected from populations with the means and variances given here....

Random samples of size n were selected from populations with the means and variances given here. Find the mean and standard deviation of the sampling distribution of the sample mean in each case. (Round your answers to four decimal places.)
(a) n = 25, μ = 12, σ2 = 9
μ =
σ =
(b) n = 100, μ = 3, σ2 = 4
μ =
σ =
(c) n = 10, μ = 124, σ2 = 1
μ =
σ =

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Solution :

Given that,

(a)

= 12

= / n = 3 / 25 = 0.6

(b)

= 3

= / n = 2 / 100 = 0.2

(c)

= 124

= / n = 1 / 10 = 0.3162

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