Chapter 6 sec 1

Chapter 6 sec 1 - Chapter6 Section1 TheNormalDistribution...

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Chapter 6 Section 1 1 The Normal Distribution Mr. Ken Horwitz October 27, 2010
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Normal Distributions Many continuous variables have distributions that  are bell-shaped and are called  approximately  normally distributed variables . The theoretical curve, called the  bell curve  or the  Gaussian distribution , can be used to study many  variables that are not normally distributed but are  approximately normal. 2
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Normal Distributions 3 The mathematical equation for the normal distribution is: 2 2 ( ) (2 ) 2 - - = X e y μ σ π 2.718 3.14 = = where e population mean population standard deviation
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Normal Distributions The shape and position of the normal distribution  curve depend on two parameters, the  mean  and the  standard deviation Each normally distributed variable has its own  normal distribution curve, which depends on the  values of the variable’s mean and standard  deviation. 4
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Normal Distributions 5
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How do you recognize the  Normal Distribution The normal distribution curve is bell-shaped. The mean, median, and mode are equal and located 
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Chapter 6 sec 1 - Chapter6 Section1 TheNormalDistribution...

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