Question
In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Glenwood Central City Lincoln
In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Glenwood Central City Lincoln High Mean score on test 76 90 69 Number of ninth graders 253 315 157 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 78.3. 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 =
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