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Random samples of size n were selected from a normal population with the means and variances...

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

n = 25, μ = 12, σ2 = 9

Describe the shape of the sampling distribution of the sample mean.

a. The distribution is normal

b. The distribution is skewed left

c. The distribution is bimodal

d. The distribution is uniform

e. The distribution is skewed right

Find the mean and the standard error of the sampling distribution of the sample mean.

Mean: _______

Standard error: _________

Math   Statistics-And-Probability   
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