Neco 2020 Data Processing Question 48
Practice objective / multiple choice question 48 from the 2020 Neco Data Processing examination.
For a set of five observations the following summary statistics are given: \(\sum X = 50\), \(\sum Y = 70\), \(\sum XY = 800\), \(\sum X^{2} = 600\), \(\sum Y^{2} = 1100\).\n(a) Compute the Pearson correlation coefficient \(r\) (rounded to two decimal places).\n(b) Does this indicate a strong positive correlation (use the threshold \(0.7\))?\n(c) If the correlation is strong, write the least‑squares regression line \(Y = a + bX\) (round \(b\) to two decimal places and \(a\) to the nearest integer) and predict the value of \(Y\) when \(X = 12\).
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About This Question
This is Neco 2020 Data Processing Question 48. It is one of the objective questions from the 2020 Neco Data Processing examination.
Difficulty level: Medium .
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