Job Vacancies, Australia Methodology > 자유게시판

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As the estimates in this release are based on info associating with a sample of companies instead of a full enumeration, they are subject to sampling irregularity. That is, they might vary from the price quotes that would have been produced if the info had actually been obtained from all employers. This difference, called sampling error, need to not be confused with error that might take place since of flaws in reporting by respondents or in processing by the ABS. Such mistake is referred to as non-sampling mistake and might occur in any enumeration whether it be a complete count or sample. Efforts have been made to decrease non-sampling mistake by careful style of questionnaires, comprehensive monitoring of returns and quality control of processing.

The tasting error associated with any price quote can be estimated from the sample results. One procedure of tasting error is offered by the standard error which shows the degree to which a quote may vary from the value which would have been obtained from a full enumeration (the 'real worth'). There have to do with two opportunities in 3 that a sample quote differs from the true value by less than one basic error, and about 19 opportunities in 20 that the distinction will be less than two standard mistakes.

An example of using a basic mistake on levels is as follows. If the estimated number of job vacancies was 25,000 with a standard error of 2,500, then there would be about 2 opportunities in 3 that a complete enumeration would have offered an estimate in the range 22,500 to 27,500 and about 19 possibilities in 20 that it would be in the range 20,000 to 30,000.

An example of using a standard error for a quarterly change price quote is as follows. If the projected standard error for a quarterly modification quote of task vacancies was 1,000 and the quarterly change price quote in between two quarters was 4,500, then there would be about two chances in 3 that a complete enumeration would have a quarterly change estimate in the variety +3,500 to +5,500 and about 19 opportunities in 20 that it would remain in the range +2,500 to +6,500.

Quarterly movements in estimates of job vacancies are thought about to be statistically substantial where they go beyond 2 basic mistakes.

Another step of the tasting mistake (for level approximates just) is the relative basic mistake, which is obtained by expressing the standard mistake as a portion of the quote to which it refers. Level estimates with a relative standard error in between 25% and 50%, represented by an asterisk in this release, are subject to tasting irregularity usually thought about to be expensive for the majority of practical functions and must be utilized with care. Level estimates with a relative standard mistake of 50% or more, represented by a double asterisk, are thought about to be too undependable for general usage.

The following two tables shows the standard errors for quarterly level and motion for States and areas by Sector, based on original information for the current quarter. The 3rd table reveals the standard mistakes for level quotes by market.