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I am confused between chose B and D? Please explain. 7. Decreasing the sample size from 750 to 375 would multiply the standard deviation by

I am confused between chose B and D? Please explain.

7. Decreasing the sample size from 750 to 375 would multiply the standard deviation by (a) 2. (b) V2 (c) 1/2. (d) 1V/2 (e) none of these

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