SDS 306 Study Guide - Midterm Guide: Interquartile Range, Unimodality, Standard Deviation

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Exam #1 review: the following table represents the distribution of final times for the 47 finishers in the olympic alpine. 47: draw a histogram of the times start your x-axis at 126 seconds and make your bins 2 seconds wide. This does not need to beautiful (don"t use a ruler). Concentrate on accuracy not precise lines. s r e i k s f o r e b m u. The distribution of alpine skiing times for this race is unimodal and positively/right skewed. The finishing times range from just over 126 to just under 138 seconds: calculate the median. Because it is such skewed data, the best measure of center would be the median, and the best measure of spread would be the interquartile range (iqr). Choose the z-score closest to the percentage you are looking for if the exact percentage is not available.

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