If you obtain a score of 13 on an anxiety questionnaire and you know that the population mean and standard deviation are 20 and 5 respectively, what is your z-score? -2.33 -1.4 1.33 0
Added by Rebecca M.
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Step 1: Calculate the z-score using the formula: \( z = \frac{X - \mu}{\sigma} \), where \( X = 13 \), \( \mu = 20 \), and \( \sigma = 5 \). Show more…
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