I think that's also a part of their (Robert and Claire) plan. After Robert seeing Claire, he tells to Virgil something like "Claire is more beautiful than you described and I think I like her" and Virgil replies "are you trying to make me jealous?"

Since Virgil firmly believed that Robert is expert on women's matters, I think Robert is trying to send a subliminal message to Virgil Oldman that Claire is beautiful, this will result in having Virgil to be more addictive of Claire.

How did Robert's visit to Claire's house help the plot?
I am comparing length of stay after laparoscopic and open appendectomy in over 160000 patients. LOS is typically a skewed variable so I use the median and interquartile range and ranksum test to describe the result, which is 2, IQR 2-3 and 2, IQR 2-4, p&lt;0.0001. So there is a highly significant difference but it does not show that well in the median and IQR. 

The difference in length of stay is very small. This finding is a negative finding but still interesting as it goes against what most people think about LOS after laparoscopic appendectomy. That is why I want to report on the difference in LOS which is not evident if I only report median and IQR with p-value.

The arithmetic mean (3.1 vs 2.8 and a difference of 0.3 days) is not recommended as the distribution is skewed. I wonder if any other measure could be used like, geometric mean (2.5 vs 2.3, difference 0.2 days) or harmonic mean (2.1 vs 1.9 days, difference 0.2 days)?  When can I use geometric mean or harmonic mean? 

I am inclined to use the harmonic mean which comes closest to the median and gives a difference of 0.2 days. Is this incorrect?
