sample survey method of data collection
STUDIES OF WELFARE POPULATIONS Data Collection and Research Issues potx
Ngày tải lên :
06/03/2014, 15:20
... 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...
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How Do Earnings Change When Reservists Are Activated - A Reconciliation of Estimates Derived from Survey and Administrative Data docx
Ngày tải lên :
23/03/2014, 02:20
... 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,...
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Bullding tables of data
Ngày tải lên :
03/10/2013, 00:20
... 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...
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Statistical Description of Data part 1
Ngày tải lên :
20/10/2013, 17:15
... 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...
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Statistical Description of Data part 2
Ngày tải lên :
24/10/2013, 15:15
... 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...
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Statistical Description of Data part 3
Ngày tải lên :
24/10/2013, 15:15
... 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]
,...
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Statistical Description of Data part 4
Ngày tải lên :
28/10/2013, 22:15
... 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...
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Statistical Description of Data part 5
Ngày tải lên :
28/10/2013, 22:15
... . .
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...
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Statistical Description of Data part 6
Ngày tải lên :
07/11/2013, 19:15
... 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...
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Statistical Description of Data part 7
Ngày tải lên :
07/11/2013, 19:15
... 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...
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Statistical Description of Data part 8
Ngày tải lên :
07/11/2013, 19:15
... tabulate Monte Carlo results for (what amounts to) the
distribution of D as a function of (of course) D,samplesizeN, and coefficient of correlation
r. Analyzing their results, one finds that the significance ... difference (ranging both over data points and over quadrants) of the
corresponding integrated probabilities. When comparing two data sets, the value of D may
depend on which data set is ranged over. ... integrated probability of an analytic model in
each of four quadrants around an arbitrary (x, y) point. A trivial sample quadvl is shown;
realistic quadvls can be quite complicated, often incorporating...
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