A filter monitoring device which detects variances in pressure of fluid flowing through a filter element in a filter assembly includes an indicator for conveying data of changes in the differential pressure of the fluid in the filter assembly and a temperature sensor for transmitting data showing any changes in temperature of the fluid being filtered. The driving diagnosis information providing apparatus acquires vehicle information indicative of a vehicle state, and makes a diagnosis of a driving state of the vehicle based on the vehicle information. Final C, M, Y and K colors are obtained by performing the Black-Generation and Under-Color-Removal processing for the temporary values. A weighting factor may also be calculated for a set of analysts based upon factors such as the recency of an analyst’s earnings estimates.