In a normal distribution of raw scores, what is the z-score of the 50th percentile?
In a normal distribution of raw scores, what is the z-score of the 50th percentile? (a) 0 (b) 10 (c) 1 (d) 2 ✅ Correct option: (a) 0 Explanation: The mean (50th percentile) in a normal curve corresponds to z = 0.