math

The standard deviation of a sample taken from population A is 17.6 for a sample of 25. The standard deviation of a sample taken from population B is 21.2 for a sample of 30.
The standard deviation of the sample mean differences is_____. (Round your answer to the nearest hundredth.)

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asked by j
  1. (Standard error of sample means) SEm = SD/√n

    Calculate and compare.

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    posted by PsyDAG
  2. 100

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