This example is taken from Levy and Lemeshow’s
Sampling of Populations.
page 250 simple one-stage cluster sampling
This example uses the
tab9_1c
data set.
NOTE: The n = 5 in the proc surveymeans statement indicates
that there were 5 PSUs from which the sample could be drawn. You can use
this option in any non-stratified design or in a stratified design in which the
total number is equal in all strata, e.g. each strata has 20 elements from which
the sample can be drawn. The total is used to calculate the fpc; hence, if
the total is omitted, an fpc will not be calculated. The SAS keywords sum and
mean are used to modify the output.
proc surveymeans data = tab9_1c n = 5 sum mean; weight wt1; cluster devlpmnt; var nge65 nvstnrs hhneedvn; run;The SURVEYMEANS Procedure Data Summary Number of Clusters 2 Number of Observations 40 Sum of Weights 100 Statistics Std Error Variable Mean of Mean Sum Std Dev ------------------------------------------------------------------------ NGE65 1.675000 0.019365 167.500000 1.936492 NVSTNRS 0.575000 0.019365 57.500000 1.936492 HHNEEDVN 0.525000 0.019365 52.500000 1.936492 ------------------------------------------------------------------------
This example is taken from Lehtonen and Pahkinen’s
Practical Methods for Design and Analysis of Complex Surveys.
page 83 Table 3.6 Estimates from a one-stage
CLU sample (n = 8); the Province’91 population.
NOTE: The r = .25 in the
proc surveymeans statement
indicates that the sampling rate was .25. You can use this option in any
non-stratified design or in a stratified design in which the sampling rate was
the same in each strata. The rate is used to calculate the fpc; hence,
if the total is omitted, an fpc will not be calculated. The SAS keywords
sum and std are used to modify the output.
data page83; input id str clu wt ue91 lab91; fpc = 32; datalines; 1 1 2 4 666 6016 2 1 2 4 528 3818 3 1 2 4 760 5919 4 1 2 4 187 1448 5 1 8 4 129 927 6 1 8 4 128 819 7 1 8 4 331 2543 8 1 8 4 568 4011 ; run;proc surveymeans data = page83 r = .25 sum std ; weight wt; strata str; cluster clu; var ue91 lab91; run;The SURVEYMEANS Procedure Data Summary Number of Strata 1 Number of Clusters 2 Number of Observations 8 Sum of Weights 32 Statistics Variable Sum Std Dev ---------------------------------------- ue91 13188 3412.140091 lab91 102004 30834 ----------------------------------------