Exam-Style Question on Correlation
A mathematics exam-style question with a worked solution that can be revealed gradually
Question id: 84. This question is similar to one that appeared on an IB Studies paper in 2014. The use of a calculator is allowed.
The following table shows the relationship between the number of workers and the amount of time in minutes it takes them to harvest the sugar cane in a particular field.
|Workers (\(n\))||Time (\(t\))|
(a) Find the equation of the regression line of \(t\) on \(n\).
(b) Find the value of the Pearson’s product–moment correlation coefficient, r.
(c) Use the regression equation to find how long it would take seven workers to harvest the sugar cane.
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