Exercise 3.1
Using the file DECB-8, compute the average of EXPEQ for the whole of Cameroon and for each of the two regions of REGION.

Answer
STEP 1: Initialising  the sampling weight: EDIT|Set Sample Design

 

  • After choosing the appropriate variable(s), click on  the button OK.

STEP 2: Use the DAD Application: DISTRIBUTION|Statistics

  • After choosing the appropriate variable(s) and parameters, click on the  Compute button.

RESULTS
For the Cameroun

Statistics (Distribution)

Session Date Mon Jul 05 14:25:21 EDT 2004
Execution Time 0.094 sec
FileName DECB-8.daf
OBS 1000
Sampling Weight WHHLD
Variable of interest EXPEQ
Size variable SIZE
Group variable No Selection
Group Number 1
Denominator (for "Ratio") EXPEQ
Size Variable for denominator Without size

Variable

Average

STD

Min

Max

EXPEQ

563.38702929
62103.69050568
39.45000076
9336.12011719

Statistic

Estimate

STD1

STD2

DEFF

Mean

563.38702929
20.15247134
18.49375844
1.18742520

For the Region=1

Statistics (Distribution)

Session Date Mon Jul 05 14:28:03 EDT 2004
Execution Time 0.016 sec
FileName DECB-8.daf
OBS 1000
Variable of interest EXPEQ
Size variable SIZE
Group variable REGION
Group Number 1
Denominator (for "Ratio") EXPEQ
Size Variable for denominator Without size

Variable

Average

STD

Min

Max

EXPEQ

957.99134405
62103.69050568
39.45000076
9336.12011719

Statistic

Estimate

STD1

STD2

DEFF

Mean

957.99134405
45.86859036
51.81296735
0.78370724

For the Region=2

Statistics (Distribution)

Session Date Mon Jul 05 14:29:15 EDT 2004
Execution Time 0.031 sec
FileName DECB-8.daf
OBS 1000
Sampling Weight WHHLD
Variable of interest EXPEQ
Size variable SIZE
Group variable REGION
Group Number 2
Denominator (for "Ratio") EXPEQ
Size Variable for denominator Without size

Variable

Average

STD

Min

Max

EXPEQ

405.21353122
62103.69050568
39.45000076
9336.12011719

Statistic

Estimate

STD1

STD2

DEFF

Mean

405.21353122
15.13220210
10.32589940
2.14757573
Remarks :
  1. STD1 is the square root of V1, where V1 is the design-based estimate of the sampling variance of the parameter estimate.
  2. STD2 is the square root of V2, where V2 is the estimate of sampling variance of the parameter estimate under the hypothesis of simple random sampling whithout replacement.
  3. DEFF is the ratio of V1 over V2.