# Nigeria - African Peer Review Mechanism Survey(APRM)-2006, First Round

Reference ID | NGA-NBS-APRM-2006-v1.1 |

Year | 2006 |

Country | Nigeria |

Producer(s) | National Bureau of Statitics(NBS) - Federal Government of Nigeria(FGN) |

Sponsor(s) | National Bureau of Statitics - NBS - Funding New Partnership for African’s Development (NEPAD) - (NEPAD) - Funding National Focal Point Secretariat - APRM - Funding |

Metadata | Documentation in PDF Download DDI Download RDF |

Created on | Oct 18, 2010 |

Last modified | Dec 02, 2013 |

Page views | 576077 |

Downloads | 22402 |

Sampling

Sampling Procedure

The survey covered all the thirty-six states of the federation and FCT, Abuja. Both Urban and Rural areas were covered in each state. Three Local Government Areas (LGAs) were selected in each state as well as FCT, Abuja. One LGA was selected from the senatorial districts where the state capital is located. The other two LGAs were selected from the remaining senatorial districts. The selection of the 2 LGAs was based on remoteness from the state capital or on ecological factors e.g upland or riverine areas of the state. Ten Enumeration Areas (EAs) were selected per LGA making a total of 30 EAs per state. In each EA 20 households were covered. Thus, at national level, a total of 1,110 EAs and 22,200 households were covered.

The sample size from the State to the household level was as follows;

3 Senatorial Districts/ LGAs were selected in each State plus the FCT, Abuja.

110 LGAs were selected nationwide

10 EAs were selected from each LGA

1110 EAs were selected nationwide

20 Households were scientifically selected from each EA.

600 Households were scientifically selected from each State plus the FCT, Abuja.

22,200 Households were scientifically selected nationwide.

Out of 20 persons interviewed in an EA, 8 persons were male headed/Adult households, 7 persons were female headed/Adult households and 5-unmarried youth (18-24years). The breakdown of the youths respondents were 2 males and 3 females.

At EA level, 1094 EAs were studied out of 1, 110 EAs expected to be covered

Out of 22,200 Households expected to be covered ,21,808 were actualy canvassed

Deviations from Sample Design

No Deviation

Response Rate

On a national basis the survey achieved a response rate of 98.56 percent at EA level and

at household level the response rate was 98.23 percent.

Weighting

The formula adopted in calculating the design weights for the survey data (sample results) were as follows:

(i) The probability of selecting an EA within a state was obtained by dividing the total number of EAs sampled in a

state by total number of EAs in that particular state. Let this be represented by fj. That is,

fj = (Total Number of EAs sampled in a state)/(Total Number of EAs in that particular State)

(ii) Likewise, the probability of selecting an housing unit (HU) within an EA was obtained by dividing the total number

of housing units selected in an EA by the total number of housing units (HUs) listed in that particular EA. Let this be

represented by fk. That is,

fk = (Total Number of HUs selected in an EA)/(Total Number of HUs listed in that particular EA)

Then the product (fj) x (fk) represented by f is the sampling fraction for each of the corresponding study unit (Enumeration Area) for all the 1,110 EAs canvassed throughout the 36 states of the Federation and FCT, Abuja. The inverse of the sampling fraction is known as the design weight and was applied accordingly to all the study units.

Mathematically,

Design weight = ((Total number of EAs in a state)/(Total number of EAs sampled in that particular state)) X ((Total Number of HUs listed in an EA)/(Total Number of HUs selected in that particular EA))

The above value was obtained for each of the 1,110 EAs canvassed throughout the 36 states of the Federation and FCT, Abuja. Thereafter, adjustment factors were applied to adjust for the non-responses.