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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 Test Score Number of ninth graders (Frequency) 283 307 170 Glenwood 77 Central 94 Lincoln 65 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 77, 94, and 65, which is 78.7. 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 -

In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Mean Test Score Number of ninth graders (Frequency) 283 307 170 Glenwood 77 Central 94 Lincoln 65 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 77, 94, and 65, which is 78.7. 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 -

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 23PPS
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In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Number of ninth graders (Frequency) Mean Test Score Glenwood 77 283 Central 94 307 Lincoln 65 170 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 77, 94, and 65, which is 78.7. 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 =
Transcribed Image Text:In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Number of ninth graders (Frequency) Mean Test Score Glenwood 77 283 Central 94 307 Lincoln 65 170 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 77, 94, and 65, which is 78.7. 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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