Score: 0/16 0/16 answered Question 3 0/1 pt 9 3 99 0 Details In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Mean score on test `Number of ninth graders Glenwood 80 275 Central City 92 310 Lincoln High 68 171 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in bring the city was 80 . Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place. mean of all ninth grader's scores = ctor Question Help: Message instructor Submit