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Please help me figure out how to get the standard deviation! PLEASE HELP 6. The National Assessment of Educational Progress ( NAEP) includes a mathematics

Please help me figure out how to get the standard deviation! PLEASE HELP

6. The National Assessment of Educational Progress ( NAEP) includes a mathematics test for eigth-grade students. Scores on the test range from 0 to 500. Suppose that you give the NAEP test to an SRS of 900 8th-graders from a large population in which the scores have mean 269 and standard deviation 125. The meanof (xbar) will vary if you take repeated samples.

The sampling distribution of (xbar)is approximately Normal. It has mean 269.

What is its standard deviation (0.001)? ________

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