First-Day Handout for Students - Austin Community College ...

What percentile is the median? Answer: 50% of the scores are below the median. What percentile is the first quartile? Answer: 25th percentile. What about the third quartile? Answer: 75% of the scores are below this. Answers: the z-scores are 0 for the area of 50% below, -0.67 for the area of 25% below and +0.67 for the area of 75% below. ................
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