Tag Archives: Empirical Rule

A normal bell curve made with humans

A group of students are stacked according to their heights. The result resembles a normal bell curve. Who are the students in the picture? The image is from the statistics and actuarial science department of Simon Fraser University. These students … Continue reading

Posted in Exploratory Data Analysis (EDA), Normal Distributions | Tagged , , , , , | 1 Comment

An Example of a Normal Curve

One way to estimate probabilities is to use empirical data. However, if the histogram of the data shapes like a bell curve (or reasonably close to a bell curve), we can use a normal curve to estimate probabilities. All we … Continue reading

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A Student’s View of the Normal Distribution

In my teaching, I always strive to encourage students to look at statistics from a practical point of view. In a recent class period covering the normal distribution, I indicated that data values more than 3 standard deviations away from … Continue reading

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Interpreting ACT Scores

The ACT is a standardized test that is used for college and university admissions in the United States. According to their web site, the ACT test “assesses high school students’ general educational development and their ability to complete college-level work”. … Continue reading

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The Safest Driving City in America

Which city in America has the worst drivers? When I asked this questions, many people guessed New York or Los Angeles. How about the city with the safest drivers? According to a recent report released by The Allstate Insurance Company, … Continue reading

Posted in Descriptive statistics, Statistics | Tagged , , , , , , , , , , | 1 Comment