1. What can we deduce about the shape of the distribution of hospital stay?
In the Results we are told that for the length of hospital stay the geometric mean was 5.3 days (range 1 to 31) in the intervention group and 6.4 days (range 1 to 60) in the control group. The geometric mean is very close to the left hand or lower end of the range, so we can deduce that the distribution must be positively skew or skew to the right. This is typical of lengths of stay.
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Last updated: 8 July, 2008.