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statistics notes 4 - ABCD 1 2 3 3 Spreadsheet Spreadsheet...

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52 A B C D 1 2 3 3 Spreadsheet Spreadsheet programs also come equipped with built-in statistical software that allows you to compute P(a Z b). For example, to compute P(0 ° ° Z ° 2.43) in Excel, enter =NORMSDIST(2.43)-NORMSDIST(0) in any vacant cell. To compute P(-1.37 Z 2.43) directly, enter =NORMSDIST(2.43)-NORMSDIST(-1.37). Web site Follow the path Web site Æ Everything for Finite Math Æ Chapter 8 Æ Normal Distribution Utility where you will find an on-line utility that computes areas under the normal curve to a high accuracy. Approximating a Binomial Distribution by a Normal Distribution You might have noticed that the histograms of binomial distributions that we have drawn (for example, those in Figure 1) have a very rough bell shape. In fact, in many cases it is possible to draw a normal curve that closely approximates a given binomial distribution. If X is the number of successes in a sequence of n independent Bernoulli trials with probability p
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