The standard error of a normally distributed random variable is a different calculation than the standard deviation of a normally distributed variable, since it captures the variance of large number of samples drawn from the same population. Numerically, what is the change in the formula from the standard deviation to the standard error?

A. the standard error is calculated by dividing the standard deviation by the square root of n.

B. the standard error is calculated by multiplying the standard deviation by one-half

C. none- the standard error and standard deviation are actually the same number

d. the standard error is calculated by subtracting n from the standard deviation.