| 摘要 |
PROBLEM TO BE SOLVED: To generate pseudo data for reproducing statistical data with necessary accuracy while concealing actual answer items.SOLUTION: A pseudo data generation device is configured to generate pseudo data as blank lines having no value, to add the content of a data group to anonymous data group storage means for storing anonymized data, to anonymize data read from data group storage means, to store the anonymized data in the anonymous data group storage means, to perform, when calculating a statistical value related to a data value, processing for securing that the accuracy of the calculated statistical value is a fixed value or more, to generate pseudo data on the basis of the result of comparison between the number of lines of data stored in answer combination storage means and the number of lines calculated by a normal formula, and to calculate the statistical value related to the data value stored in the anonymous data group storage means. |
