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139346
 Prefix

Yet, if this issue is to be addressed properly, calculating sample sizes in the planning stage of an investigation becomes
mandatory. Although some proposals for calculating sample size are available in the literature
 Exact

(Linnet 1987, Donner and Eliasziw
1992, Cantor 1996, W
 Suffix

Donner and Eliasziw
1992, Cantor 1996, Walter et al. 1998; Shrout and Newman 1989), to our knowledge there has only been a limited implementation
in one sample size oriented package (Statistical Solutions 1999) and none in any of the major commercial statistical software
packages, Stata included.
 (check this in PDF content)

 Start

139385
 Prefix

Yet, if this issue is to be addressed properly, calculating sample sizes in the planning stage of an investigation becomes
mandatory. Although some proposals for calculating sample size are available in the literature (Linnet 1987, Donner and Eliasziw
1992,
 Exact

Cantor 1996, Walter et al. 1998;
 Suffix

ter et al. 1998; Shrout and Newman 1989), to our knowledge there has only been a limited implementation
in one sample size oriented package (Statistical Solutions 1999) and none in any of the major commercial statistical software
packages, Stata included.
 (check this in PDF content)

 Start

140254
 Prefix

evaluating a binary event.sskdlgis geared towards calculating a sample size from a precision oriented
perspective, that is, choosing a sample size so that the standard error of the estimate and the resulting limits for a confidence
interval do not exceed specified values. The program is based on the asymptotic variance presented by Fleiss, et al. (1969) (see
also
 Exact

Fleiss 1981, equations 13.15–13.18)
 Suffix

equations 13.15–13.18) and follows the procedure outlined by Cantor (1996). This procedure is based on a
quantity
Q=(1e)1
nX
i
0[(1e)(:i+i:)(10)]2
+(10)2
X
i6=j
ij(:j+2j:)(0e2e+0)2
o
where, given a22table,e=1::1+2::2ando=11+22.
 (check this in PDF content)

 Start

140338
 Prefix

a precision oriented
perspective, that is, choosing a sample size so that the standard error of the estimate and the resulting limits for a confidence
interval do not exceed specified values. The program is based on the asymptotic variance presented by Fleiss, et al. (1969) (see
also Fleiss 1981, equations 13.15–13.18) and follows the procedure outlined by
 Exact

Cantor (1996)
 Suffix

This procedure is based on a
quantity
Q=(1e)1
nX
i
0[(1e)(:i+i:)(10)]2
+(10)2
X
i6=j
ij(:j+2j:)(0e2e+0)2
o
where, given a22table,e=1::1+2::2ando=11+22.SinceQequals the variance of kappa times the sample
size, the latter can be solved out and calculated.
 (check this in PDF content)