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 80 289 Central City Lincoln High The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in 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. 93 342 67 170 mean of all ninth grader's scores =

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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
289
Central City
93
342
Lincoln High
The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in 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.
67
170
mean of all ninth grader's scores =
Transcribed Image Text: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 80 289 Central City 93 342 Lincoln High The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in 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. 67 170 mean of all ninth grader's scores =
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