Problem Discussion1:48 with Ken Alger
Let's look at a new dataset with a business purpose in mind.
[MUSIC] 0:00 A photographer friend of mine, Steve, was commissioned to take pictures of 0:01 the Old Faithful geyser at Yellowstone National Park in Wyoming. 0:07 For those not familiar with Old Faithful, 0:13 it is a cone geyser in Yellowstone with a predictable geothermal eruption. 0:15 Steve hopes to take some amazing pictures for his client. 0:21 He will be taking both still pictures and video. 0:24 He would like to know the best opportunities for taking still photos or 0:25 short videos of a single eruption. 0:30 I've discovered some data about Old Faithful's eruption events. 0:33 It provides both the eruption time and wait time between eruptions in minutes, 0:37 for 272 observed eruptions. 0:41 That's quite a few eruptions to go through manually. 0:46 Let's see if we can but our DataVis talents to use and 0:49 help Steve determine the best times to take videos and still shots. 0:52 With all the different chart types we've covered 0:56 which is the best tool in our DataVis toolbox? 0:59 Based on Steve's business needs, 1:02 I think providing him with a few pieces of information would be helpful. 1:04 One, the average time an eruption lasts, so 1:09 he can determine how many memory cards he'll need for his camera. 1:12 Or perhaps, he's going old school, and old faithful, and using film. 1:16 Anyway, how long you should expect to wait between eruptions? 1:20 And three, if there's a correlation between the length of time of the eruption 1:24 and the wait time between eruptions. 1:28 This should help Steve know if he should set his camera to video for 1:31 a short eruption or to plan on taking still photos during a longer eruption. 1:34 Let's take a short break here, 1:39 let out a little steam and think about charting techniques to use. 1:40 When we get back together we'd go through my process for this project. 1:44
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