Karina took an assessment on creativity which resulted in a normal distribution curve. 68% of those who took the assessment scored below her. What is Karina's z-score?
A) +1.49
B) -1.49
C) +.47
D) -.47

Question

Quizplus · Accepted Answer

In a normal distribution, 68% of the values fall within one standard deviation from the mean. Since Karina scored above 68% of the scores, her score is one standard deviation above the mean. Therefore, her z-score is +1. This eliminates choices C and D. To find the exact z-score, we need to look up the corresponding area under the normal distribution curve, which is 0.9332. Using a z-score table or calculator, we find that the z-score that corresponds to an area of 0.9332 is approximately 1.49. However, since Karina scored above the mean, her z-score is positive, so the correct answer is B, -1.49 (rounded to two decimal places).

Karina Took an Assessment on Creativity Which Resulted in a Normal