A maintenance group aims to improve the effectiveness of its repair work. The group therefore monitors the number of maintenance requests that require a second visit to complete the repair. On any given week the maintenance group responds to 200 maintenance requests. The following table summarizes the number of those maintenance requests that required a second visit in the last five weeks. What type of control chart should be used here? Select one: a. run test b. c-chart c. range chart d. p-chart e. mean chart Clear my choice