Gce Model Questions Vol1 2018 Mathematics Question 22
Practice objective / multiple choice question 22 from the 2018 Gce Model Questions Vol1 Mathematics examination.
In a school, Class A has 20 students with a mean score of 68 and a sample standard deviation of 5. Class B has 30 students with a mean score of 74 and a sample standard deviation of 6. (a) Verify the overall mean score for the combined 50 students. (b) Assuming the given standard deviations are sample standard deviations, calculate the combined sample standard deviation for all 50 students. Give your answer correct to two decimal places.
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About This Question
This is Gce Model Questions Vol1 2018 Mathematics Question 22. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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