From the course: Learning Data Science: Ask Great Questions

Unlock the full course today

Join today to access over 22,600 courses taught by industry experts or purchase this course individually.

Highlight missing data

Highlight missing data

From the course: Learning Data Science: Ask Great Questions

Start my 1-month free trial

Highlight missing data

“

- One of the best places to ask good questions is to check for missing information. A little bit of missing information can significantly change the story. Sometimes the data is incomplete. Other times the person intentionally left out the data because it tells a different story. You see this a lot with advertising. Take a very common advertisement. You may have heard the popular claim that four out of five dentists recommend sugarless gum. That seems like a pretty strong show of support. Yet, there's a bit of information that's missing. A well placed question can change the whole story. What do dentists generally tell their patients about chewing gum? Maybe a 100% of dentists tell their patients to never chew gum. Of those maybe 10% of patients insist that they cannot give up the habit. So, for that 10% the majority of dentists say, "If you insist on chewing gum, "then at least make sure it's sugarless." As you can see that's an entirely different story. No advertiser is going to…

Contents