1970 HUNGARIAN CENSUS OF POPULATION Information on the data collection and processing (1977)

I. THE COMPREHENSIVE REWIEV OF THE DATA COLLECTION AND PROCESSING - 11. The control of the reliability of the census

Individual occupation It is striking that the error of the distbirution according to branches of national economy is lower to a considerable extent than that of individual occupations. In the latter there is uncertainty mainly in connection with the distinction between physical and mental labour. (Table 8). The application of the numeration of the Uniform Classification System of Occupations (FEOR) will probably improve the results of the next census in 1980. From among the 11 rubrics of individual occupations the net errors exceed the standard error of response dispersion in four cases which shows that it is not merely random dispersion due to careless work but is a systematic error. We may reassure the users of the data because the percentage distribution of the data of the census and the post-enumeration control are so close that no misinterpretation may arise from this. The difference between the two percentages reaches 1,14 units only in the rubric "storing and manipulation and other physical labour", it is everywhere within 1 perceni; with the exception of the collection group (it fluctuates between -0, 05 and +0, 56). The gross error of the whole distribution is 21, 74 percent, opposed to this is the net error of 3, 27 percent, i. e. the majority of the errors is cancelled which is also shown by the above-mentioned coincidence of percentage distribution. Table 8. INDEX-NUMBERS OF THE RELIABILITY OF THE DATA OF INDIVIDUAL OCCUPATION OF THE CENSUS a/ Percentage dist. Difference between percentages Identically grouped items Gross Net Individual occupation P.C. Survey Difference between percentages Identically grouped items errors Index of inconsistency Individual occupation Census P.C. Survey Difference between percentages in the percentage of the census return Index of inconsistency Physical labour industry 25, 90 26,18 0, 28 90, 56 19, 93 1, 05 o, 269 construction industry 7, 25 7,14 + 0,11 83, 87 30, 73 + 1, 48 0, 332 agriculture 14, 53 14, 71 0,18 96, 72 7, 77 1, 21 0, 091 trade, catering 3, 09 2,88 + 0,21 83, 60 26, 18 + 6, 62 0, 270 service 0, 52 0,51 + 0,01 92, 45 13. 21 + 1, 89 0, 133 transport 5, 61 5,46 + 0,15 87, 50 22, 22 + 2, 78 0, 235 storing, other 15, 32 16,46 1,14 84, 04 39, 35 7, 44 o, 465 Mental labour: technical 7, 29 6,82 + 0,47 82, 75 28, 07 + 6, 42 o, 303 administr. , economic 1, 89 1,94 0,05 95, 36 11, 86 2, 58 o, 121 health, culture 5, 60 5,46 + 0,14 95, 83 5, 91 + 2, 43 0, 063 office, accountancy 13, 00 12,44 + 0, 56 88, 38 18, 97 + 4, 27 0, 218 Total 100, 00 100, 00 89, 13 21, 74 W 3, 27 227 a

/ The employed and collective farmers. - b/ The sum of the absolute numbers of net errors, compared with the total number of persons. - c/ Simple arithmetical mean. 107