1. A computer-implemented method, comprising: receiving a query; establishing a target confidence level for the query, the target confidence level representing a requested level of accuracy for a result of the query; assigning at least one individual confidence level to each of a plurality of analytics engines; querying one or more of the analytics engines based on the query; selecting, by a computer processor, a group of the analytics engines whose query responses to the query are deemed to be similar to one another, wherein the selection of the group is at least partially based on the target confidence level; and summarizing into a final result the query responses from the selected group of analytics engines, the final result being an answer to the query.