1.

IF the population standard deviation is not known then the formula used to calculate standard error is as

A. n - 1 ⁄ sample size square root
B. s ⁄ sample size square root
C. n + 1 ⁄ square root of s
D. n * 2 ⁄ sample size square root
Answer» C. n + 1 ⁄ square root of s


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