Posted by **D** on Wednesday, November 14, 2012 at 4:51pm.

The mean height of fully grown birch trees are 18 feet with a standard deviation of 1.2 feet, normally distributed. Random samples of size 9 are drawn from this population and the mean of each sample is determined. Find that mean and the standard error of the mean, and the standard deviation of the sampling distribution of the sample means.

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