This research is on the curriculum for the education of statistical data-collection. Among the 4 steps of data
processing, that is the collection of data, the presentation of summary, the analysis of data, and the interpretation of results, the
first step of data-collection needs more logical and ethical attitudes rather than technical rigors, compared to the presentation
of summary or the analysis of data. However, the misleading conclusions caused by erroneous collections of data are as serious
as those resulted in the two technical steps. Unlike the remaining three steps of data processing in which the errors may be
corrected by simple remedies, there is no alternative other than the cumbersome recollection of data to make up the careless
collection of data. What’s worse is that the recollection of data consumes unexpected time and expenses and it bothers most
statistical researchers ethically. This study analyzes secondary school mathematics curriculum with regard to data-collection,
and suggests not only the objectives, but also the content materials of data-collection lessons for its innovations. The actual
performance is far more important than the knowledge itself in the data-collection lessons, while it is not quite so in other 3
steps of data-processing. Which means that it would be more effective to assess the achievement of student’s learning of datacollection
through the performance-test rather than through the pencil-and-paper test. Accordingly, we raise ethical problems
and statistical seriousness of them in the data-collection step for the objectives and content materials of the data-collection curriculum
and present the practical potential problem items of performance tests for a test tool of its evaluation.