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Mathematics, 27.02.2020 00:15 lulbbyz
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 gradersGlenwood 78 269Central City 93 321Lincoln High 66 161The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 79 . Of course, that is incorrect.
a. What is the mean score for all ninth graders in the city? Round to two decimal places.
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In a city with three high schools, all the ninth graders took a Standardized Test, with these result...
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