A normal distribution curve, where x = 70 and σ = 15, was created by a teacher using her students' grades. What information about their performances can be obtained by analyzing the curve?

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Dania Schwartz

Mathematics

23 April, 12:34

A normal distribution curve, where x = 70 and σ = 15, was created by a teacher using her students' grades. What information about their performances can be obtained by analyzing the curve?

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Ernesto Cruz · Answer 1

The curve is a normal distribution curve where x = 70 and σ = 15. The variable x is the mean of the students' grades which is equal to 70. The standard deviation is 15, the actual mean is 70+-15. A normally distributed curve means that most of the students got mostly 75.