Metropolitan Research, Inc., a consumer research organization, conducts surveys designed
to evaluate a wide variety of products and services available to consumers. In one particular
study, Metropolitan looked at consumer satisfaction with the performance of automobiles
produced by a major Detroit manufacturer. A questionnaire sent to owners of one of
the manufacturer’s full-sized cars revealed several complaints about early transmission
problems. To learn more about the transmission failures, Metropolitan used a sample of
actual transmission repairs provided by a transmission repair firm in the Detroit area. The
following data show the actual number of miles driven for 50 vehicles at the time of transmission
failure.