# 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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3. 👁 454
1. (Standard error of sample means) SEm = SD/√n

Calculate and compare.

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2. 👎 0
posted by PsyDAG
2. 100

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2. 👎 0

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