For a population with a mean of μ = 80 and a standard deviation of σ = 12,a score of X = 77 corresponds to z = -0.50.

Name: For a population with a mean of μ = 80 and a standard deviation of σ = 12,a score of X = 77 corresponds to z = -0.50.
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Question

Quizplus · Accepted Answer

The z-score is calculated using the formula $z = \frac{X - \mu}{\sigma}$. Plugging in the given values, $z = \frac{77 - 80}{12} = -\frac{3}{12} = -0.25$, not -0.50.

For a Population with a Mean of μ = 80