In a certain normal distribution of scores, the mean is 30 and the standard deviation is 3. Find the z-score corresponding to a score of 23.
Accepted Solution
A:
Answer:-2.333Step-by-step explanation:In a certain normal distribution of scores, the mean is 30 and the standard deviation is 3. Find the z-score corresponding to a score of 23.The z-score corresponding to an observed value in a normal distribution is calculated as;z-score = (observed value - mean)/(standard deviation) Our observed score is 23, the mean is 30, and the standard deviation is 3. The z-score will thus be;z-score = ( 23 - 30)/( 3) z-score = -2.333