6. Accuracy and reliability |
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6.1. Accuracy - overall |
6.1.1 How good is the accuracy? |
Medium |
6.1.2 What are the main factors lowering the accuracy? |
Non-response error |
6.1.3 If Other, please specify |
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6.1.4 Additional comments |
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6.2. Sampling error |
Sample survey
These questions only apply to surveys. If there is more than one survey, please describe the main survey below and the additional ones in table 6.2 of the annexed Excel file |
6.2.1 Name/Title |
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6.2.2 Methods used to assess the sampling error |
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6.2.3 If Other, please specify |
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6.2.4 If coefficients of variation are calculated, please describe the calculation methods and formulas |
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6.2.5 Sampling error - indicators |
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6.2.6 Additional comments |
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6.3. Non-sampling error |
See sections below. |
6.3.1. Coverage error |
Census
These questions only apply to censuses. If there is more than one census, please describe the main census below and the additional ones in table 6.3 of the annexed Excel file |
6.3.1.1 Name/Title |
Anual report on production of fish for consumption and juveniles in aquaculture |
Over-coverage |
6.3.1.2 Over-coverage - rate |
From the total number of units from the list 4.4% stated that are not involved in commercial aquaculture production destined to human consumption. |
Under-coverage |
6.3.1.3 Does the sample frame include all units falling within the scope of this survey? |
Yes |
6.3.1.4 If Not, which units are not included? |
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6.3.1.5 How large do you estimate the proportion of those units? (%) |
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6.3.1.6 Impact on the data quality |
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Misclassification |
6.3.1.7 Impact on the data quality |
None |
Common units |
6.3.1.8 Common units - proportion |
Not applicable. |
6.3.1.9 Additional comments |
The full coverage of all active commercial facilities for aquaculture production is ensured by the creation of a unique list of enterprises registered in the Business Registers Agency to perform the production of fish for consumption and juveniles or are registered in another activity but perform this production, and natural persons registrated by Ministry of Agriculture, Forestry and Water Management (Veterinary Administration) аs owners of aquaculture facilities. The updating of the list of reporting units is carried out once in the current year with the status as at 31 December of the previous year, using the available sources (Statistical Business Register, Evidention of aquaculture facilities of the Ministry of Agriculture, Forestry and Water Management), including contacting the reporting units, field visits and conducting the census itself. |
Sample survey
These questions only apply to surveys. If there is more than one survey, please describe the main survey below and the additional ones in table 6.3 of the annexed Excel file |
6.3.1.10 Name/Title |
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Over-coverage |
6.3.1.11 Over-coverage - rate |
Not applicable. |
Under-coverage |
6.3.1.12 Does the sample frame include all units falling within the scope of this survey? |
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6.3.1.13 If Not, which units are not included? |
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6.3.1.14 How large do you estimate the proportion of those units? (%) |
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6.3.1.15 Impact on the data quality |
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Misclassification |
6.3.1.16 Impact on the data quality |
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Common units |
6.3.1.17 Common units - proportion |
Not applicable. |
6.3.1.18 Additional comments |
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Administrative data
These questions only apply to administrative sources. If there is more than one administrative source, please describe the main source below and the additional ones in table 6.3 of the annexed Excel file |
6.3.1.19 Name/Title |
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Over-coverage |
6.3.1.20 Over-coverage - rate |
Not applicable. |
Under-coverage |
6.3.1.21 Does the administrative source include all units falling within the scope of this survey? |
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6.3.1.22 If Not, which units are not included? |
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6.3.1.23 How large do you estimate the proportion of those units? (%) |
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6.3.1.24 Impact on the data quality |
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Misclassification |
6.3.1.25 Impact on the data quality |
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6.3.1.26 Additional comments |
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6.3.2. Measurement error |
Census
These questions only apply to censuses. If there is more than one census, please describe the main census below and the additional ones in table 6.3 of the annexed Excel file |
6.3.2.1 Name/Title |
Anual report on production of fish for consumption and juveniles in aquaculture |
6.3.2.2 Is the questionnaire based on usual concepts for respondents? |
Yes |
6.3.2.3 Number of censuses already performed with the current questionnaire? |
11 |
6.3.2.4 Explanatory notes/handbook for surveyors/respondents? |
Yes |
6.3.2.5 On-line FAQ or Hot-line support for surveyors/respondents? |
Yes |
6.3.2.6 Other actions taken for reducing the measurement error? |
After preparation of the questionnaire with the participation of experts in the field of fishery, the questionnaire was tested by several reporting units, which gave a positive assessment of the clarity of content. In order accuracy of filled questionnaires, a brief explanation for the reporting units is given below each table in the questionnaire. Particular attention is given to the concept realized (sold) in the tables that relate to the production of fish for consumption, due to the fact that the displayed amount of fish means produced quantity in the reference year. Training of representatives of SORS regional offises who are directly involved in the implementation of this census was held. Among other things, their task is to contact the reporting units and provide additional explanation regarding filling in the questionnaires. In the event that, despite all the action taken, questionnaire is incorrectly filled out, they are obliged to call the reporting unit and along with it to make correction. In addition, the internal analysis of data based on expected values for certain phenomena - external data is carried out (eg. semi-intensive production of the carp fish ponds range in the interval from about 700 to 1000 t / ha, in trout from 10 to 20 kg / m3 ). |
6.3.2.7 Additional comments |
In order to comply with the common EU fisheries policy, for the needs of the Ministry of Agriculture, Forestry and Water Management, as a part of the regular statistical survey Annual report on the production of fish for consumption and juveniles in 2022, certain data were collected regarding socio-economic indicators in aquaculture, but the content of the questionnaire relating to Regulation (EC) 762/2008 is the same as in previous years. Data on socio-economic indicators in aquaculture are regularly provided from 2022. |
Sample survey
These questions only apply to surveys. If there is more than one survey, please describe the main survey below and the additional ones in table 6.3 of the annexed Excel file |
6.3.2.8 Name/Title |
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6.3.2.9 Is the questionnaire based on usual concepts for respondents? |
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6.3.2.10 Number of surveys already performed with the current questionnaire? |
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6.3.2.11 Explanatory notes/handbook for surveyors/respondents? |
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6.3.2.12 On-line FAQ or Hot-line support for surveyors/respondents? |
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6.3.2.13 Other actions taken for reducing the measurement error? |
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6.3.2.14 Additional comments |
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6.3.3. Non response error |
Census
These questions only apply to censuses. If there is more than one census, please describe the main census below and the additional ones in table 6.3 of the annexed Excel file |
6.3.3.1 Name/Title |
Anual report on production of fish for consumption and juveniles in aquaculture |
6.3.3.2 Unit non-response - rate |
In relation to the total number of reporting units, in the last census non-response was 16.3%. |
6.3.3.3 How do you evaluate the recorded unit non-response rate in the overall context? |
Moderate |
6.3.3.4 Measures taken for minimising the unit non-response |
Follow-up interviews |
6.3.3.5 If Other, please specify |
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6.3.3.6 Item non-response rate |
Not available |
6.3.3.7 Item non-response rate - Minimum |
Not available |
6.3.3.8 Item non-response rate - Maximum |
Not available |
6.3.3.9 Which items had a high item non-response rate? |
There are no items with a significant (high) non-response rate. Incomplete responses mainly refer to the average price per weight unit at first sale or size of facilities. |
6.3.3.10 Additional comments |
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Sample survey
These questions only apply to surveys. If there is more than one survey, please describe the main survey below and the additional ones in table 6.3 of the annexed Excel file |
6.3.3.11 Name/Title |
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6.3.3.12 Unit non-response - rate |
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6.3.3.13 How do you evaluate the recorded unit non-response rate in the overall context? |
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6.3.3.14 Measures taken for minimising the unit non-response |
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6.3.3.15 If Other, please specify |
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6.3.3.16 Item non-response rate |
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6.3.3.17 Item non-response rate - Minimum |
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6.3.3.18 Item non-response rate - Maximum |
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6.3.3.19 Which items had a high item non-response rate? |
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6.3.3.20 Additional comments |
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6.3.4. Processing error |
Census
These questions only apply to censuses. If there is more than one census, please describe the main census below and the additional ones in table 6.3 of the annexed Excel file |
6.3.4.1 Name/Title |
Anual report on production of fish for consumption and juveniles in aquaculture |
6.3.4.2 Imputation - rate |
There is no evidention on number of imputations. |
6.3.4.3 Imputation - basis |
Similar units Same unit in previous data |
6.3.4.4 If Other, please specify |
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6.3.4.5 Additional comments |
Processing errors have been removed in the process of testing applications for data entry and formating output tables in the IST program. |
Sample survey
These questions only apply to surveys. If there is more than one survey, please describe the main survey below and the additional ones in table 6.3 of the annexed Excel file |
6.3.4.6 Name/Title |
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6.3.4.7 Imputation - rate |
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6.3.4.8 Imputation - basis |
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6.3.4.9 If Other, please specify |
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6.3.4.10 How do you evaluate the impact of imputation on Coefficients of Variation? |
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6.3.4.11 Additionnal comments |
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6.3.5. Model assumption error |
Not applicable. |
6.4. Seasonal adjustment |
Not applicable. |
6.5. Data revision - policy |
General policy revision was adopted by the institution, it is available on the SORS website and can be accessed via the following website: Stat website (dokumenti). |
6.6. Data revision - practice |
6.6.1 Data revision - average size |
Data revision was not applied. |
6.6.2 Were data revisions due to conceptual changes (e.g. new definitions) carried out since the last quality report? |
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6.6.3 What was the main reason for the revisions? |
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6.6.4 How do you evaluate the impact of the revisions? |
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6.6.5 Additional comments |
Not applicable |
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