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Download e-book for iPad: Bootstrapping: a nonparametric approach to statistical by Christopher Z. Mooney, Robert D. Duval, Robert Duval

By Christopher Z. Mooney, Robert D. Duval, Robert Duval

ISBN-10: 080395381X

ISBN-13: 9780803953819

Bootstrapping, a computational nonparametric strategy for "re-sampling," allows researchers to attract a end concerning the features of a inhabitants strictly from the present pattern instead of by way of making parametric assumptions in regards to the estimator. utilizing actual info examples from according to capita own source of revenue to median choice alterations among legislative committee participants and the complete legislature, Mooney and Duval talk about how one can practice bootstrapping whilst the underlying sampling distribution of the facts can't be assumed common, in addition to whilst the sampling distribution has no analytic resolution. moreover, they express the benefits and barriers of 4 bootstrap self assurance period equipment: common approximation, percenti

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Additional info for Bootstrapping: a nonparametric approach to statistical inference, Issues 94-95

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234-236). 5 Page 11 2. From the EDF, draw a simple random sample of size n with replacement. This is a "resample," 3. Calculate the statistic of interest, , from this resample, yielding . 4. Repeat steps 2 and 3 B times, where B is a large number. The practical magnitude of B depends on the tests to be run on the data. Typically, B should be 50-200 to estimate the standard error of and at least 1,000 to estimate confidence intervals around (Efron & Tibshirani, 1986, sec. 9). 5. Construct a probability distribution from the B 's by placing a probability of 1/B at each point,6 This distribution is the bootstrapped estimate of the sampling distribution of As will be discussed in Chapter 2, this distribution can be used to make inferences about q.

Construct an empirical probability distribution, from the sample by placing a probability of 1/n at each point, x1, x2, . . , xn. This is the empirical distribution function (EDF) of x, which is the nonparametric maximum likelihood estimate (MLE) of the population distribution function, F(X) (Rohatgi, 1984, pp. 234-236). 5 Page 11 2. From the EDF, draw a simple random sample of size n with replacement. This is a "resample," 3. Calculate the statistic of interest, , from this resample, yielding .

Consider the one-sample case, where a simple random sample of size n is drawn from an unspecified probability distribution, F, so that Xi ~ indF. , the variable in the case of a sample mean model, or the error term in a regression model), and x is the sample realization of X. The basic steps in the bootstrap procedure are as follows: 1. Construct an empirical probability distribution, from the sample by placing a probability of 1/n at each point, x1, x2, . . , xn. This is the empirical distribution function (EDF) of x, which is the nonparametric maximum likelihood estimate (MLE) of the population distribution function, F(X) (Rohatgi, 1984, pp.

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Bootstrapping: a nonparametric approach to statistical inference, Issues 94-95 by Christopher Z. Mooney, Robert D. Duval, Robert Duval


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