Understanding Z-Scores

This video tutorial explains how to measure the distance of a data value from the mean using z-scores. It covers the basics of normal distribution, mean, and standard deviation. The tutorial compares SAT and ACT scores, demonstrating why direct comparison is invalid due to different scales. It introduces z-scores as a standard measure and provides examples of calculating z-scores for various data points. The tutorial concludes by applying z-scores to SAT and ACT scores to determine which score is relatively better.

What does it mean if a z-score is negative?

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What are the mean and standard deviation for the SAT and ACT scores mentioned in the lesson?

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How can you determine if one score is better than another using z-scores?

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