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myOpenMath Home > Master 111A_J1 (MW) > Assessment HW 3 Save progress Done Score: 63/139 30/56 answered Question 31 1 pt 5 1 2 98 Details In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Glenwood Central City Lincoln High Number of ninth graders 76 94 65 Mean score on test 253 322 152 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 78.3. 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 Submit Question

myOpenMath Home > Master 111A_J1 (MW) > Assessment HW 3 Save progress Done Score: 63/139 30/56 answered Question 31 1 pt 5 1 2 98 Details In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Glenwood Central City Lincoln High Number of ninth graders 76 94 65 Mean score on test 253 322 152 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 78.3. 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 Submit Question

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myOpenMath Home > Master 111A_J1 (MW) > Assessment HW 3 Save progress Done Score: 63/139 30/56 answered Question 31 1 pt 5 1 2 98 Details In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Glenwood Central City Lincoln High Number of ninth graders 76 94 65 Mean score on test 253 322 152 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 78.3. 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 Submit Question
Transcribed Image Text:myOpenMath Home > Master 111A_J1 (MW) > Assessment HW 3 Save progress Done Score: 63/139 30/56 answered Question 31 1 pt 5 1 2 98 Details In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Glenwood Central City Lincoln High Number of ninth graders 76 94 65 Mean score on test 253 322 152 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 78.3. 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 Submit Question
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