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Tag Archives: Standard Deviation
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
Looking at Spread
In the previous post Two Statisticians in a Battlefield, we discussed the importance of reporting a spread in addition to an average when describing data. In this post we look at three specific notions of spread. They are measures that … Continue reading
Two Statisticians in a Battlefield
Two soldiers, both statisticians, were fighting side by side in a battlefield. They spotted an enemy soldier and they both fired their rifles. One statistician soldier fired one foot to the left of the enemy soldier and the other statistician … Continue reading
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
Introductory Statistics 