Find the probability that a sample mean is larger

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Reference no: EM13709355

Which of the following formulas would you use to find the probability that a sample mean is larger than some given value?
z = (x - µ) ÷ σ
µ = ∑x ÷ N

z = (x¯ - μx-bar) ÷ σx-bar

t = (x - µ) ÷ s

Reference no: EM13709355

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