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Two radiologists are asked to look at a chest X-ray. They both looks at it. One spots a shadow that she think looks like cancer. … Read More

You have six carefully made questions that you distribute to employee in a survey, hoping that you’ll measure their engagement. You tabulate response and calculate … Read More

Your data isn’t neatly distributed in some classic form. It’s not a nice, tidy bell curve; it’s a little too messy. And then traditional stats … Read More

Sometimes you find that certain groups behave very different than the larger population they are part of. That the sum of several things is drastically … Read More

So you conduct an experiment, gather some data, get a number and it seems high. Is it noise? Or is it a real signal? This … Read More

In your experiment, you have 12 data points. That’s not a big sample, yet you want to make conclusive claims about larger group that these … Read More

For example, maybe you’re testing a new marketing campaign, and you think people respond different depending on where they live. So you gather the results, … Read More

If you think about randomness, chances are you imagine chaos. It is a disorderly mix of everything happening everywhere at once, a mess. But hidden … Read More

But time seems to pass slower then it actualy does. Three minutes on a clock feel like an eternity while sitting at a counter. That’s … Read More

Consider a standardized test, for instance. You’re familiar with typical test scores, you know the mean and you know the range of test scores among … Read More