sample survey method of data collection
Báo cáo y học: " The cross-sectional GRAS sample: A comprehensive phenotypical data collection of schizophrenic patients" pptx
Ngày tải lên: 11/08/2014, 16:22
Báo cáo y học: "Standardisation of data collection in traumatic brain injury: key to the future" pot
Ngày tải lên: 13/08/2014, 19:20
STUDIES OF WELFARE POPULATIONS Data Collection and Research Issues potx
... the perspective that each sample survey is but one realization of a survey design. In this case, the survey design contains all the specifications of the re- search data collection. The design includes ... income with administrative data compared to survey data; and (4) the availability of administrative data on children. Issues in the matching and cleaning of administrative data are discussed by Goerge ... POPULATIONS STUDIES OF Data Collection and Research Issues 36 DESIGNING SURVEYS ACKNOWLEDGING NONRESPONSE researcher, affecting the nature of the survey requests and the attributes of the actors (the...
Ngày tải lên: 06/03/2014, 15:20
How Do Earnings Change When Reservists Are Activated - A Reconciliation of Estimates Derived from Survey and Administrative Data docx
... losses. Estimates of earnings changes derived from SOFS-R and administrative data might differ for a number of reasons. e SOFS-R and administrative data differ in the samples of reservists surveyed, ... Changes 21 Table 3.6 Comparison of Mean Civilian Earnings in SOFS-R and Administrative Data (in dollars) Sample SOFS-R Administrative Data SOFS-R Minus Administrative Data % Difference Number A. ... administrative and SOFS-R data sources produce such divergent estimates of the effect of activation on the earnings of reservists and will be of interest to manpower analysts, survey methodologists,...
Ngày tải lên: 23/03/2014, 02:20
Báo cáo hóa học: " ´ The L1-Version of the Cramer-von Mises Test for Two-Sample Comparisons in Microarray Data Analysis" potx
Ngày tải lên: 22/06/2014, 22:20
Báo cáo y học: "Time use choices and healthy body weight: A multivariate analysis of data from the American Time use Survey" pot
Ngày tải lên: 14/08/2014, 08:20
Bullding tables of data
... tabular data as a collection of collections. Each DataTable object contains a collection of ordered rows, each existing as an instance of a DataRow object. Each row contains its own collection of ... unnamedTable = new System .Data. DataTable(); System .Data. DataTable namedTable = new System .Data. DataTable("Customer"); Visual Basic Dim unnamedTable As New System .Data. DataTable() Dim namedTable ... property of the resulting DataTable object. Rename the sample table to Customer. Dwonloaded from: iDATA.ws 18 The physical implementation of a DataTable object is somewhat different. Instead of one...
Ngày tải lên: 03/10/2013, 00:20
Statistical Description of Data part 1
... 610 Chapter 14. Statistical Description of Data Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5) Copyright (C) 1988-1992 ... tendency, the moments of a distribution, the median and mode. In Đ14.2 we learn to test whether different data sets are drawn from distributions with different values of these measures of central tendency. ... characterize the degree of correlation in some simple ways. The distinction between parametric and nonparametric (rank) methods is emphasized. Section 14.8 introduces the concept of data smoothing, and...
Ngày tải lên: 20/10/2013, 17:15
Statistical Description of Data part 2
... the mean is not the only available estimator of this 614 Chapter 14. Statistical Description of Data Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5) Copyright ... (14.1.13) The median of a distribution is estimated from a sample of values x 1 , , x N by finding that value x i which has equal numbers of values above it and below it. Of course, this is not ... (14.1.14). This is a process of order N log N. You might rightly think 612 Chapter 14. Statistical Description of Data Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN...
Ngày tải lên: 24/10/2013, 15:15
Statistical Description of Data part 3
... makes use of the following routine for computing the mean and variance of a set of numbers, 620 Chapter 14. Statistical Description of Data Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC ... final example of a Student’s t test is the case of paired samples.Here we imagine that much of the variance in both samples is due to effects that are point-by-point identical in the two samples. ... 1 degrees of freedom. The routine is #include <math.h> void tptest(float data1 [], float data2 [], unsigned long n, float *t, float *prob) Given the paired arrays data1 [1 n] and data2 [1 n] ,...
Ngày tải lên: 24/10/2013, 15:15
Statistical Description of Data part 4
... the data sets are drawn from the same distribution. Small values of prob show that the cumulative distribution function of data1 is significantly different from that of data2 . The arrays data1 and data2 are ... takes his data to be the first 1000 birds that he saw in each year, then the number of degrees of freedom is N B − 1. If he takes his data to be all the birds he saw on a random sample of days, ... number of data points, N e = N for the case (14.3.5) of one distribution, and N e = N 1 N 2 N 1 + N 2 (14.3.10) for the case (14.3.6) of two distributions, where N 1 is the number of data points...
Ngày tải lên: 28/10/2013, 22:15
Statistical Description of Data part 5
... . . 1. red # of red males N 11 # of red females N 21 # of green females N 22 # of green males N 12 # of males N 1 ⋅ # of females N 2 ⋅ 2. green # of red N ⋅ 1 # of green N ⋅ 2 total ... number of degrees of freedom is equal to the number of entries in the table (product of its row size and column size) minus the number of constraints that have arisen from our use of the data themselves ... since the total of the column totals and the total of the row totals both equal N, the total number of data points. Therefore, if the table is of size I by J, the number of degrees of freedom is IJ...
Ngày tải lên: 28/10/2013, 22:15
Statistical Description of Data part 6
... respectively, the number of data points in the measurement of r 1 and r 2 . All of the significances above are two-sided. If you wish to disprove the null hypothesis in favor of a one-sided hypothesis, ... is the mean of the x i ’s, y is the mean of the y i ’s. The value of r lies between −1 and 1, inclusive. It takes on a value of 1,termed “complete positive correlation,” when the data points ... concept of nonparametric correlation is this: If we replace the value of each x i by the value of its rank among all the other x i ’s in the sample, that is, 1, 2, 3, ,N, then the resulting list of...
Ngày tải lên: 07/11/2013, 19:15
Statistical Description of Data part 7
... relative ordering of the ranks of the two x’s is opposite from the relative ordering of the ranks of the two y’s. If there is a tie in either the ranks of the two x’s or the ranks of the two y’s, ... kendl1(float data1 [], float data2 [], unsigned long n, float *tau, float *z, float *prob) Given data arrays data1 [1 n] and data2 [1 n] , this program returns Kendall’s τ as tau , its number of standard ... "nrutil.h" void spear(float data1 [], float data2 [], unsigned long n, float *d, float *zd, float *probd, float *rs, float *probrs) Given two data arrays, data1 [1 n] and data2 [1 n] , this routine...
Ngày tải lên: 07/11/2013, 19:15