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Data Mining Just for Fun

A friend of mine and I happened to disagree on the overall quality of Sci-Fi movies. I thought they were worse than average, he thought the opposite. Since quite a number of hours of watching Sci-Fi was at stake, I decided to gather some user rating data from IMDB. To my satisfaction, Sci-Fi was the second worst category (horror was #1), with an weighted average vote of 5.26 vs. 6.22 (out of 10) for non-Sci-Fi movies. Which isn't to say that all Sci-Fi movies are bad. As can be seen from the graph, there are a few excellent Sci-Fi movies, but there are also a lot of bad ones. Here is a full list of ratings and vote distributions for other categories.