A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Mean of all ninth graders score
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)
Glenwood
76
260
Central
95
326
Lincoln
68
168
The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city
was the average of 76, 95, and 68, which is 79.7. 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 =
Hint: Textbook Measures of Center
Submit Question
fn
fo
f8
fg
144
7
1-
IOI
&
7.
6.
4.
R.
Y.
U
00
96
96
%24
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Transcribed Image Text: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) Glenwood 76 260 Central 95 326 Lincoln 68 168 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 76, 95, and 68, which is 79.7. 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 = Hint: Textbook Measures of Center Submit Question fn fo f8 fg 144 7 1- IOI & 7. 6. 4. R. Y. U 00 96 96 %24
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