Neco 2021 Data Processing Question 20
Practice objective / multiple choice question 20 from the 2021 Neco Data Processing examination.
A survey of 200 students recorded the number of hours they spend on ICT each week. The data were grouped as follows: 0-4 hrs: 30 students; 5-9 hrs: 50 students; 10-14 hrs: 70 students; 15-19 hrs: 40 students; 20-24 hrs: 10 students. Assuming the midpoint of each class represents all students in that class, (a) calculate the estimated mean number of hours per week, and (b) if the school wants to raise the average by 10 % by adding 5 extra hours per week to each student in the 0-4 hr group, how many additional total hours must be added across all students to reach the target mean?
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About This Question
This is Neco 2021 Data Processing Question 20. It is one of the objective questions from the 2021 Neco Data Processing examination.
Difficulty level: Medium .
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