Tag Archives: Empirical Rule

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

Posted in Normal Distributions, Statistics | Tagged , , , , | Leave a comment

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

Posted in Commentary, Descriptive statistics, Normal Distributions, Statistics | Tagged , , , , , | 1 Comment

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

Posted in Descriptive statistics, Statistics | Tagged , , , , , , | Leave a comment

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