From the course: Statistics Foundations 2: Probability

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Bell-shaped curve

Bell-shaped curve - Microsoft Excel Tutorial

From the course: Statistics Foundations 2: Probability

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Bell-shaped curve

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- Three teachers, each has a class of 20 students. Each gives an exam. How did these three classes do on an exam? In class number one, 85 seems to be the most popular score, but most students scored below. Some students got very low scores. Notice, there is a long tail of low scores that extends left. This histogram is skewed to the left. In class number two, 70 seems to be the most popular score, but many students scored above 70, and a few students got some really high scores. Here, there is a long tail of higher that extends right. This histogram is skewed to the right. And when we look at class number three, the distribution is all over the place, some high scores, some low scores, some in between. It's hard to find a pattern in class number three. Interestingly, many things do follow a pattern. In the case of heights of people, or national standardized test scores, even health data. Often we find that data follows…

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