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 78 258 Central City 92 335 Lincoln High 66 186 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 78.7 . Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place.

Q: n a city with three high schools, all the ninth graders took a Standardized Test, with these…

A: Given Information:   Mean test score Number of ninth graders Glenwood 78 258 Central 96 303…

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A: Solution: x(1) Frequency (f)(2) f⋅d(4)=(2)×(3) cf(6) 50 2 -2 -4 2 60 5 -1 -5 7 70=A 9 0 0…

Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

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Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

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Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

A: Given Information : In a city with three high schools, all the ninth graders took a Standardized…

Q: n a city with three high schools, all the ninth graders took a Standardized Test, with these…

A: Formula : x¯ =x¯1 n1+x¯2 n2 + x¯3 n3n1+n2+n3

Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

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Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

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Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

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Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

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