If you have a population with a mu of 55 and a sigma of 21, what is the standard deviation of the distribution of x-bar

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answerhappygod
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If you have a population with a mu of 55 and a sigma of 21, what is the standard deviation of the distribution of x-bar

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If you have a population with a mu of 55 and a sigma of 21, whatis the standard deviation of the distribution of x-bar if yoursample size is 22?
A. 1.89
B. 4.48
C. 7.59
D. 21
E. 22
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