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Q. |
Consider a large population with a mean of 160 and a standard deviation of 25. A random sample of size 64 is taken from this population. What is the standard deviation of the sample mean? |
A. | 3.125 |
B. | 2.5 |
C. | 3.75 |
D. | 5.625 |
Answer» A. 3.125 |
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