Neco Model Questions Vol1 2023 Mathematics Question 23
Practice objective / multiple choice question 23 from the 2023 Neco Model Questions Vol1 Mathematics examination.
An initial data set of 15 observations has a mean of 48 and a standard deviation of 6. Five additional observations are then added, and the combined data set of 20 observations has a mean of 50 and a standard deviation of 8. Find (i) the sum of the five new observations, and (ii) the standard deviation of those five observations.
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About This Question
This is Neco Model Questions Vol1 2023 Mathematics Question 23. It is one of the objective questions from the 2023 Neco Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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