Igcse Model Questions Vol1 2018 Mathematics Question 15
Practice objective / multiple choice question 15 from the 2018 Igcse Model Questions Vol1 Mathematics examination.
The marks obtained by 25 students in two examinations are summarised as follows: for Exam A the mean is 68 and the standard deviation is 8; for Exam B the mean is 72 and the standard deviation is 6. The Pearson correlation coefficient between the two sets of marks is 0.6. Assuming a linear relationship, determine the least‑squares regression line for predicting the Exam B mark (\(y\)) from the Exam A mark (\(x\)). Then use this line to predict the Exam B mark of a student who scored 80 in Exam A. Give the predicted mark to one decimal place.
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About This Question
This is Igcse Model Questions Vol1 2018 Mathematics Question 15. It is one of the objective questions from the 2018 Igcse Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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