mgcr 271 1

mgcr 271 1 - McGill University BCom Program Statistics...

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McGill University BCom Program Statistics MGCR-271 2011 Week 2 Part I
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The Normal Probability Distribution Read: The Practice of Business Statistics Moore, McCabe, Duckworth, Alwan, 3rd edition Chapter 1(sections 1.3)
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Probability Distribution of a Continuous Random Variable Examples of Normally Distributed RV’s Human weight, height, IQ Wingspan of Dragon-flies Cost of Textbooks Monthly returns on equity Etc….
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The Gaussian Equation f(x) has two main properties: f(x) is nonnegative. The total area under the curve is equal to 1. 2 2 1 2 1 ) ( x e x f
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if 68 % of the data is in the interval (x + s) if 95 % of the data is in the interval (x + 2s), and if 99.7 % (i.e. virtually all) of the data is in the interval (x + 3s) The Empirical Rule
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a b The probability that a randomly selected x lies between a and b is equal to the area under the curve between a and b . b
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This note was uploaded on 09/18/2011 for the course MGCR 2049 taught by Professor Edwardbierbrier during the Spring '10 term at McGill.

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mgcr 271 1 - McGill University BCom Program Statistics...

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