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15 March, 11:53

Scores on a dental anxiety scale range from 0 (no anxiety) to 20 (extreme anxiety). The scores are normally distributed with a mean of 11 and a standard deviation of 4. Find the z-score for the following raw score: 12

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  1. 15 March, 12:27
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    Z-score = (raw score - mean) / standard deviation = (12 - 11) / 4 = 1/4 = 0.25
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