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Question 86:



No answer provided yet.Quartiles are just taking 100 percentage points and dividing by 4. So the 1st through 4 Quartiles are the 25th, 50th and 75th percentiles. If you wanted Quintiles, youd divide by 5. For the z-score of the third quartile we just lookup .75 in the Percentile to Z-score calculator , assuming its the two-sided area were interested in, the z-score is 1.15.

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