Scores on a math test have average of 85 with standard deviation of 10. What is the z-score for a student who earned a 90 on the test?
Added by Shareef C.
Step 1
Step 1: Calculate the z-score using the formula: \( z = \frac{x - \mu}{\sigma} \), where \( x = 90 \) (score earned by the student), \( \mu = 85 \) (average score), and \( \sigma = 10 \) (standard deviation). Show more…
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