Bad Measurement
Garbage In: What Makes Bad Data • 4m 53s
Even when you measure the right thing, your data will be bad if you measure it in the wrong way. "Accuracy" is a good word that describes what we get from good measurement. But when our measures are not accurate, our data will mislead us.
Up Next in Garbage In: What Makes Bad Data
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Sample Bias
If your sample is biased, it doesn't matter very much what you do with it. With selection bias, sample bias, and more, it's a lot easier to get a biased sample than get a representative one.
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Problems with Variance
If every employee gets a positive evaluation, then what is the purpose of the evaluation in the first place? Without variance in data, we can't really draw any conclusions about what data means. Yet often in the workplace we value consistency so much that we drive variance out of key measures. Th...
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Too Much Story
The desire to tell a certain story through our data can lead us to manipulate results and create a misleading picture. Don't let the pressure to succeed overwhelm your commitment to understanding the world as it is.
