Given the μ=65 and σ=5 of a population of Math Exam scores. The z−value that corresponds to a score of X=74 is
μ=65 and σ=5
X=74
z=x−μσ⇒z=74−655=1.8z=\dfrac{x-\mu}{\sigma} \\\Rightarrow z=\dfrac{74-65}{5}=1.8z=σx−μ⇒z=574−65=1.8
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