Which of these z-scores might represent a very difficult item in the normal distribution?a.+2.33b.−.52c.−2.06d.+.20
Question
Solution 1
In a normal distribution, a z-score represents how many standard deviations an element is from the mean. A positive z-score indicates the data point is higher than the mean, while a negative z-score indicates it is lower.
In the context of a test item's difficulty, a very difficult item would be on Knowee AI is a powerful AI-powered study tool designed to help you to solve study problem.
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Knowee AI is a powerful AI-powered study tool designed to help you to solve study problem.
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