Need help figuring out how to determine a zscore for a normal distribution (or bell curve) in statistics? From Ramanujan to calculus cocreator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to find a zscore for a bell curve.
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How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

How To: Find the area of a parallelogram using geometry

How To: Determine the age of a fossil using carbon14

How To: Convert improper fractions to mixed numbers

How To: Find the area & perimeter of triangles & squares

How To: Find the formula of a piecewise function given a graph

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