A sample was selected from a population with μ = 75 and σ = 20. What is the standard error of M for a sample of n = 25 scores? a) 3 b)15 c).80 d) 4

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A sample was selected from a population with μ = 75 and σ = 20. What is the standard error of M for a sample of n = 25 scores?

a) 3

b)15

c).80

d) 4

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