Gce Model Questions Vol1 2018 Mathematics Question 7
Practice objective / multiple choice question 7 from the 2018 Gce Model Questions Vol1 Mathematics examination.
Exam scores of 40 students are grouped as follows: \(40\le x\le49\):5, \(50\le x\le59\):9, \(60\le x\le69\):12, \(70\le x\le79\):8, \(80\le x\le89\):4, \(90\le x\le99\):2. Assume scores are uniformly distributed within each interval. (i) Estimate the mean score. (ii) Estimate the standard deviation. (iii) Estimate the percentage of students whose scores lie within one standard deviation of the mean. Give the final percentage to the nearest whole percent.
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About This Question
This is Gce Model Questions Vol1 2018 Mathematics Question 7. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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