Statistics Archives

Regression Toward the Mean: 7 Real-World Examples

What does “regression toward the mean” mean in psychology? How does it apply to everyday life? Regression toward the mean refers to the principle that, over repeated sampling periods, outliers tend to revert to the mean. High performers show disappointing results when they fail to continue delivering; strugglers show sudden improvement. We’ll cover what it means to regress toward the mean in psychology, 7 examples of regression toward the mean, and how to counter biases related to this phenomenon.

Premature Birth: Chances of Baby Survival

A premature birth occurs before 36 weeks and occurs in 12% of pregnancies. Early-term is between 37-38 weeks, and full-term is 39 and beyond. Over the past decades, survival for preterm babies has increased dramatically due to improvements like assisted ventilation (lungs develop later in pregnancy). It’s a marvel that even babies born at 22 weeks still have a shot at survival. What are the specific chances of survival for each week of pregnancy? How likely is a baby to survive at 24 weeks, vs 26 weeks, and 28 weeks?

Can Money Buy Happiness? Up to a Point

Can money buy happiness? Some might say it depends on who you ask, but social scientists might say it depends on how much you have. Learn how money affects your levels of happiness, why more isn’t necessarily better, and why more might actually be worse.

Types of Curves in Graphs—Explanation & Examples

What are the different types of curves you can graph? How do the curves differ from each other? We’ll cover curves, with examples from real world statistics.

Is the World Getting Better or Worse? [Statistics]

If you’ve turned on a TV or read a newspaper in the last two decades or so, you’d have a pretty grim picture of the world. Terrorism. Extreme poverty. Deadly epidemics. And it’s getting worse all the time. But this view is completely wrong. Not only are things much better than we think—they’re better than they’ve ever been.