Neco 2017 Data Processing Question 27
Practice objective / multiple choice question 27 from the 2017 Neco Data Processing examination.
The scores of 50 students in a mathematics test are grouped in intervals as follows: 40-49 (midpoint 44.5) frequency 8; 50-59 (midpoint 54.5) frequency 12; 60-69 (midpoint 64.5) frequency 15; 70-79 (midpoint 74.5) frequency ?; 80-89 (midpoint 84.5) frequency ?. The total of all scores is 3155. Assuming each student\'s score equals the midpoint of its interval, find the mean score of the class, correct to one decimal place.
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About This Question
This is Neco 2017 Data Processing Question 27. It is one of the objective questions from the 2017 Neco Data Processing examination.
Difficulty level: Medium .
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