List at least three different statistical analyses where z-scores are used.
What is the meaning of negative z-scores and one/two-tail percentiles?
A student scored 70 (of 100) in a Chemistry test where the mean was 50 and the standard deviation was 20. His friend scored 80 (of 100) in a Spanish test where the mean was 70 and the standard deviation was 15. Which student outperformed a greater percent of students in his class?
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