What is the difference between standard error of the mean (SEM) and standard deviation (SD)?
A. Standard deviation tells us about how well we can trust mean from samples.
B. They are the same.
C. Standard error of the mean tells us about how well we can trust mean from samples.
D. Standard deviation is square of Standard error of the mean.
Ans: C. Standard error of the mean tells us about how well we can trust mean from samples.
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