cw2 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 75 288 Central City 96 304 Lincoln High 67 176   The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 79.3 . Of course, that is incorrect. What is the mean score for all ninth graders in the city?  Mean of all ninth grader's scores =  Round to 2 places

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cw2

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 75 288
Central City 96 304
Lincoln High 67 176

 

The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 79.3 . Of course, that is incorrect.

What is the mean score for all ninth graders in the city? 

Mean of all ninth grader's scores =  Round to 2 places

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