1. A management system that manages a plurality of information processing apparatuses, comprising: a network interface configured to receive management information from each information processing apparatus; a processor configured to determine a status of the information processing apparatus based on the management information; a memory storing the status of the information processing apparatus, and a plurality of analysis rule information for identifying a cause apparatus, which is a root cause of the status; and a display device displaying the status of the information processing apparatus, wherein the memory stores a plurality of analysis result information, each of which is created on the basis of the analysis rule information and includes: cause information denoting the root cause of failed apparatus, one or more status conditions related to the information processing apparatus for identifying the root cause apparatus using sufficient conditions, a certainty factor that represents likelihood of the root cause information, and one or more detected statuses that satisfy either all or a portion of the one or more status conditions, wherein the processor is configured to select a plurality of aggregation-targeted analysis result information from the plurality of the analysis result information, wherein the processor is configured to create post aggregation root cause information based on the root cause information included in the plurality of aggregation-targeted analysis result information, wherein the processor is configured to compute a post-aggregation certainty factor based on the certainty factor included in the plurality of aggregation-targeted analysis result information, and instead of displaying each of the plurality of aggregation-targeted analysis result information, to cause the display device to display the post aggregation root cause information and the post-aggregation certainty factor which is higher than a minimum of the certainty factors in the aggregation-targeted analysis result information.