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A sample of n = 4 scores has a variance of s 2 = 64. What is the estimated standard error for the sample mean?

A sample of n = 4 scores has a variance of s2 = 64. What is the estimated standard error for the sample mean?

a. sM = 1

b. sM = 2

c. sM = 4

d. sM = 16

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