Neco Model Questions Vol1 2023 Mathematics Question 32
Practice objective / multiple choice question 32 from the 2023 Neco Model Questions Vol1 Mathematics examination.
In a class of 30 students, the mean score in examination \(X\) is 68 with a standard deviation of 8. The sum of the variances of examinations \(X\) and \(Y\) is 200, and the correlation coefficient between the two examinations is 0.6. The overall mean of the two examinations (i.e., the mean of \(\frac{X+Y}{2}\) for each student) is 72. Determine the regression line of \(Y\) on \(X\) and use it to predict the score in \(Y\) for a student who obtained 80 in \(X\). Give the predicted \(Y\) score to one decimal place.
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About This Question
This is Neco Model Questions Vol1 2023 Mathematics Question 32. It is one of the objective questions from the 2023 Neco Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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