Abstract: A system and method that facilitates and effectuates estimating the result of performing a data analysis operation on a set of data. Employing an approximation of the data analysis operation on a statistically valid random sample view of the data allows for a statistically accurate estimate of the result to be obtained. Sequential sampling in the view enables the approximated operation to evaluate accuracy conditions at intervals during the scan of the sample view and obtain the estimated result without having to scan the entire sample view. Feedback regarding the accuracy of the estimated result can be captured when the data analysis operation is performed against the set of data. Process control techniques can be employed with the feedback to maintain the statistical validity of the sample view.

Abstract: A floor structure for a self-supporting motor vehicle body is provided which has a down and up open central tunnel and a power unit crossmember extending under the central tunnel. Two mutually opposite supporting profiles are secured in a force-transmitting manner on the power-unit crossmember. Each supporting profile has a dimensionally rigid supporting leg which extends along a lateral tunnel wall of the tunnel arrangement and is arranged parallel to said tunnel wall at a small distance therefrom. In relation to the longitudinal direction of the vehicle the supporting profiles extend at least over part of the length of the power-unit crossmember.